diff --git a/openair3/NAS/TOOLS/conf2uedata.c b/openair3/NAS/TOOLS/conf2uedata.c
index cef55dbcb76cf2744a6f20e35edc525f33988fd8..486b7e2bff0ee32dfdf301bc6c7d166b81baec5e 100644
--- a/openair3/NAS/TOOLS/conf2uedata.c
+++ b/openair3/NAS/TOOLS/conf2uedata.c
@@ -11,8 +11,6 @@
 #include "display.h"
 #include "fs.h"
 
-const char *output_dir = NULL;
-
 const char *msin = NULL;
 const char *usim_api_k = NULL;
 const char *msisdn = NULL;
@@ -39,6 +37,7 @@ network_record_t* user_network_record_list = NULL;
 int main(int argc, char**argv) {
 	int option;
     const char* conf_file = NULL;
+    const char* output_dir = NULL;
     const char options[]="c:o:h";
 
     while ((option = getopt(argc, argv, options)) != -1) {
@@ -70,7 +69,7 @@ int main(int argc, char**argv) {
 		return EXIT_FAILURE;
 	}
 
-    if ( parse_config_file(conf_file) == EXIT_FAILURE ) {
+    if ( parse_config_file(output_dir, conf_file) == EXIT_FAILURE ) {
         exit(EXIT_FAILURE);
     }
 
@@ -79,7 +78,7 @@ int main(int argc, char**argv) {
 	exit(EXIT_SUCCESS);
 }
 
-int parse_config_file(const char *filename) {
+int parse_config_file(const char *output_dir, const char *conf_filename) {
 	int rc = EXIT_SUCCESS;
     int ret;
     int ue_nb = 0;
@@ -89,7 +88,7 @@ int parse_config_file(const char *filename) {
     char user[10];
     config_t cfg;
 
-    ret = get_config_from_file(filename, &cfg);
+    ret = get_config_from_file(conf_filename, &cfg);
     if (ret == EXIT_FAILURE) {
         exit(1);
     }
@@ -110,6 +109,10 @@ int parse_config_file(const char *filename) {
     fill_network_record_list();
 
     for (int i = 0; i < ue_nb; i++) {
+	    emm_nvdata_t emm_data;
+	    user_nvdata_t user_data;
+	    usim_data_t usim_data;
+
         sprintf(user, "%s%d", UE, i);
 
         ue_setting = config_setting_get_member(root_setting, user);
@@ -118,11 +121,12 @@ int parse_config_file(const char *filename) {
             return EXIT_FAILURE;
         }
 
-        rc = parse_ue_user_param(ue_setting, i);
+        rc = parse_ue_user_param(ue_setting, i, &user_data);
         if (rc != EXIT_SUCCESS) {
             printf("Problem in USER section for UE%d. EXITING...\n", i);
             return EXIT_FAILURE;
         }
+        write_user_data(output_dir, i, &user_data);
 
         rc = parse_ue_sim_param(ue_setting, i);
         if (rc != EXIT_SUCCESS) {
@@ -134,9 +138,12 @@ int parse_config_file(const char *filename) {
         if (rc != EXIT_SUCCESS) {
             return EXIT_FAILURE;
         }
-        gen_emm_data(i);
-        gen_usim_data(i);
-    }
+        gen_emm_data(i, &emm_data);
+        write_emm_data(output_dir, i, &emm_data);
+
+        gen_usim_data(&usim_data);
+        write_usim_data(output_dir, i, &usim_data);
+     }
     config_destroy(&cfg);
 	return(EXIT_SUCCESS);
 }
@@ -161,142 +168,141 @@ int get_config_from_file(const char *filename, config_t *config) {
     return EXIT_SUCCESS;
 }
 
-void gen_usim_data(int user_id) {
-	usim_data_t usim_data = { };
-	memset(&usim_data, 0, sizeof(usim_data_t));
-	usim_data.imsi.length = 8;
-	usim_data.imsi.u.num.parity = get_msin_parity(msin);
+void gen_usim_data(usim_data_t *usim_data) {
+	memset(usim_data, 0, sizeof(usim_data_t));
+	usim_data->imsi.length = 8;
+	usim_data->imsi.u.num.parity = get_msin_parity(msin);
 
-	usim_data.imsi.u.num.digit1 = user_plmn_list[hplmn_index].mcc[0];
-	usim_data.imsi.u.num.digit2 = user_plmn_list[hplmn_index].mcc[1];
-	usim_data.imsi.u.num.digit3 = user_plmn_list[hplmn_index].mcc[2];
+	usim_data->imsi.u.num.digit1 = user_plmn_list[hplmn_index].mcc[0];
+	usim_data->imsi.u.num.digit2 = user_plmn_list[hplmn_index].mcc[1];
+	usim_data->imsi.u.num.digit3 = user_plmn_list[hplmn_index].mcc[2];
 
-	usim_data.imsi.u.num.digit4 = user_plmn_list[hplmn_index].mnc[0];
-	usim_data.imsi.u.num.digit5 = user_plmn_list[hplmn_index].mnc[1];
+	usim_data->imsi.u.num.digit4 = user_plmn_list[hplmn_index].mnc[0];
+	usim_data->imsi.u.num.digit5 = user_plmn_list[hplmn_index].mnc[1];
 
 	if (strlen(user_plmn_list[hplmn_index].mnc) == 2) {
-		usim_data.imsi.u.num.digit6 = msin[0];
-		usim_data.imsi.u.num.digit7 = msin[1];
-		usim_data.imsi.u.num.digit8 = msin[2];
-		usim_data.imsi.u.num.digit9 = msin[3];
-		usim_data.imsi.u.num.digit10 = msin[4];
-		usim_data.imsi.u.num.digit11 = msin[5];
-		usim_data.imsi.u.num.digit12 = msin[6];
-		usim_data.imsi.u.num.digit13 = msin[7];
-		usim_data.imsi.u.num.digit14 = msin[8];
-		usim_data.imsi.u.num.digit15 = msin[9];
+		usim_data->imsi.u.num.digit6 = msin[0];
+		usim_data->imsi.u.num.digit7 = msin[1];
+		usim_data->imsi.u.num.digit8 = msin[2];
+		usim_data->imsi.u.num.digit9 = msin[3];
+		usim_data->imsi.u.num.digit10 = msin[4];
+		usim_data->imsi.u.num.digit11 = msin[5];
+		usim_data->imsi.u.num.digit12 = msin[6];
+		usim_data->imsi.u.num.digit13 = msin[7];
+		usim_data->imsi.u.num.digit14 = msin[8];
+		usim_data->imsi.u.num.digit15 = msin[9];
 	} else {
-		usim_data.imsi.u.num.digit6 = user_plmn_list[hplmn_index].mnc[2];
-		usim_data.imsi.u.num.digit7 = msin[0];
-		usim_data.imsi.u.num.digit8 = msin[1];
-		usim_data.imsi.u.num.digit9 = msin[2];
-		usim_data.imsi.u.num.digit10 = msin[3];
-		usim_data.imsi.u.num.digit11 = msin[4];
-		usim_data.imsi.u.num.digit12 = msin[5];
-		usim_data.imsi.u.num.digit13 = msin[6];
-		usim_data.imsi.u.num.digit14 = msin[7];
-		usim_data.imsi.u.num.digit15 = msin[8];
+		usim_data->imsi.u.num.digit6 = user_plmn_list[hplmn_index].mnc[2];
+		usim_data->imsi.u.num.digit7 = msin[0];
+		usim_data->imsi.u.num.digit8 = msin[1];
+		usim_data->imsi.u.num.digit9 = msin[2];
+		usim_data->imsi.u.num.digit10 = msin[3];
+		usim_data->imsi.u.num.digit11 = msin[4];
+		usim_data->imsi.u.num.digit12 = msin[5];
+		usim_data->imsi.u.num.digit13 = msin[6];
+		usim_data->imsi.u.num.digit14 = msin[7];
+		usim_data->imsi.u.num.digit15 = msin[8];
 	}
 
 	/*
 	 * Ciphering and Integrity Keys
 	 */
-	usim_data.keys.ksi = KSI;
-	memset(&usim_data.keys.ck, 0, USIM_CK_SIZE);
-	memset(&usim_data.keys.ik, 0, USIM_IK_SIZE);
+	usim_data->keys.ksi = KSI;
+	memset(&usim_data->keys.ck, 0, USIM_CK_SIZE);
+	memset(&usim_data->keys.ik, 0, USIM_IK_SIZE);
 	/*
 	 * Higher Priority PLMN search period
 	 */
-	usim_data.hpplmn = 0x00; /* Disable timer */
+	usim_data->hpplmn = 0x00; /* Disable timer */
 
 	/*
 	 * List of Forbidden PLMNs
 	 */
 	for (int i = 0; i < USIM_FPLMN_MAX; i++) {
-		memset(&usim_data.fplmn[i], 0xff, sizeof(plmn_t));
+		memset(&usim_data->fplmn[i], 0xff, sizeof(plmn_t));
 	}
 	if (fplmn_nb > 0) {
 		for (int i = 0; i < fplmn_nb; i++) {
-			usim_data.fplmn[i] = user_network_record_list[fplmn[i]].plmn;
+			usim_data->fplmn[i] = user_network_record_list[fplmn[i]].plmn;
 		}
 	}
 
 	/*
 	 * Location Information
 	 */
-	usim_data.loci.tmsi = DEFAULT_TMSI;
-	usim_data.loci.lai.plmn = user_network_record_list[hplmn_index].plmn;
-	usim_data.loci.lai.lac = DEFAULT_LAC;
-	usim_data.loci.status = USIM_LOCI_NOT_UPDATED;
+	usim_data->loci.tmsi = DEFAULT_TMSI;
+	usim_data->loci.lai.plmn = user_network_record_list[hplmn_index].plmn;
+	usim_data->loci.lai.lac = DEFAULT_LAC;
+	usim_data->loci.status = USIM_LOCI_NOT_UPDATED;
 	/*
 	 * Packet Switched Location Information
 	 */
-	usim_data.psloci.p_tmsi = DEFAULT_P_TMSI;
-	usim_data.psloci.signature[0] = 0x01;
-	usim_data.psloci.signature[1] = 0x02;
-	usim_data.psloci.signature[2] = 0x03;
-	usim_data.psloci.rai.plmn = user_network_record_list[hplmn_index].plmn;
-	usim_data.psloci.rai.lac = DEFAULT_LAC;
-	usim_data.psloci.rai.rac = DEFAULT_RAC;
-	usim_data.psloci.status = USIM_PSLOCI_NOT_UPDATED;
+	usim_data->psloci.p_tmsi = DEFAULT_P_TMSI;
+	usim_data->psloci.signature[0] = 0x01;
+	usim_data->psloci.signature[1] = 0x02;
+	usim_data->psloci.signature[2] = 0x03;
+	usim_data->psloci.rai.plmn = user_network_record_list[hplmn_index].plmn;
+	usim_data->psloci.rai.lac = DEFAULT_LAC;
+	usim_data->psloci.rai.rac = DEFAULT_RAC;
+	usim_data->psloci.status = USIM_PSLOCI_NOT_UPDATED;
 	/*
 	 * Administrative Data
 	 */
-	usim_data.ad.UE_Operation_Mode = USIM_NORMAL_MODE;
-	usim_data.ad.Additional_Info = 0xffff;
-	usim_data.ad.MNC_Length = strlen(user_plmn_list[hplmn_index].mnc);
+	usim_data->ad.UE_Operation_Mode = USIM_NORMAL_MODE;
+	usim_data->ad.Additional_Info = 0xffff;
+	usim_data->ad.MNC_Length = strlen(user_plmn_list[hplmn_index].mnc);
 	/*
 	 * EPS NAS security context
 	 */
-	usim_data.securityctx.length = 52;
-	usim_data.securityctx.KSIasme.type = USIM_KSI_ASME_TAG;
-	usim_data.securityctx.KSIasme.length = 1;
-	usim_data.securityctx.KSIasme.value[0] = KSI_ASME;
-	usim_data.securityctx.Kasme.type = USIM_K_ASME_TAG;
-	usim_data.securityctx.Kasme.length = USIM_K_ASME_SIZE;
-	memset(usim_data.securityctx.Kasme.value, 0,
-			usim_data.securityctx.Kasme.length);
-	usim_data.securityctx.ulNAScount.type = USIM_UL_NAS_COUNT_TAG;
-	usim_data.securityctx.ulNAScount.length = USIM_UL_NAS_COUNT_SIZE;
-	memset(usim_data.securityctx.ulNAScount.value, 0,
-			usim_data.securityctx.ulNAScount.length);
-	usim_data.securityctx.dlNAScount.type = USIM_DL_NAS_COUNT_TAG;
-	usim_data.securityctx.dlNAScount.length = USIM_DL_NAS_COUNT_SIZE;
-	memset(usim_data.securityctx.dlNAScount.value, 0,
-			usim_data.securityctx.dlNAScount.length);
-	usim_data.securityctx.algorithmID.type = USIM_INT_ENC_ALGORITHMS_TAG;
-	usim_data.securityctx.algorithmID.length = 1;
-	usim_data.securityctx.algorithmID.value[0] = SECURITY_ALGORITHMS;
+	usim_data->securityctx.length = 52;
+	usim_data->securityctx.KSIasme.type = USIM_KSI_ASME_TAG;
+	usim_data->securityctx.KSIasme.length = 1;
+	usim_data->securityctx.KSIasme.value[0] = KSI_ASME;
+	usim_data->securityctx.Kasme.type = USIM_K_ASME_TAG;
+	usim_data->securityctx.Kasme.length = USIM_K_ASME_SIZE;
+	memset(usim_data->securityctx.Kasme.value, 0,
+			usim_data->securityctx.Kasme.length);
+	usim_data->securityctx.ulNAScount.type = USIM_UL_NAS_COUNT_TAG;
+	usim_data->securityctx.ulNAScount.length = USIM_UL_NAS_COUNT_SIZE;
+	memset(usim_data->securityctx.ulNAScount.value, 0,
+			usim_data->securityctx.ulNAScount.length);
+	usim_data->securityctx.dlNAScount.type = USIM_DL_NAS_COUNT_TAG;
+	usim_data->securityctx.dlNAScount.length = USIM_DL_NAS_COUNT_SIZE;
+	memset(usim_data->securityctx.dlNAScount.value, 0,
+			usim_data->securityctx.dlNAScount.length);
+	usim_data->securityctx.algorithmID.type = USIM_INT_ENC_ALGORITHMS_TAG;
+	usim_data->securityctx.algorithmID.length = 1;
+	usim_data->securityctx.algorithmID.value[0] = SECURITY_ALGORITHMS;
 	/*
 	 * Subcriber's Number
 	 */
-	usim_data.msisdn.length = 7;
-	usim_data.msisdn.number.ext = 1;
-	usim_data.msisdn.number.ton = MSISDN_TON_UNKNOWKN;
-	usim_data.msisdn.number.npi = MSISDN_NPI_ISDN_TELEPHONY;
-	usim_data.msisdn.conf1_record_id = 0xff; /* Not used */
-	usim_data.msisdn.ext1_record_id = 0xff; /* Not used */
+	usim_data->msisdn.length = 7;
+	usim_data->msisdn.number.ext = 1;
+	usim_data->msisdn.number.ton = MSISDN_TON_UNKNOWKN;
+	usim_data->msisdn.number.npi = MSISDN_NPI_ISDN_TELEPHONY;
+	usim_data->msisdn.conf1_record_id = 0xff; /* Not used */
+	usim_data->msisdn.ext1_record_id = 0xff; /* Not used */
 	int j = 0;
 	for (int i = 0; i < strlen(msisdn); i += 2) {
-		usim_data.msisdn.number.digit[j].msb = msisdn[i];
+		usim_data->msisdn.number.digit[j].msb = msisdn[i];
 		j++;
 	}
 	j = 0;
 	for (int i = 1; i < strlen(msisdn); i += 2) {
-		usim_data.msisdn.number.digit[j].lsb = msisdn[i];
+		usim_data->msisdn.number.digit[j].lsb = msisdn[i];
 		j++;
 
 	}
 	if (strlen(msisdn) % 2 == 0) {
 		for (int i = strlen(msisdn) / 2; i < 10; i++) {
-			usim_data.msisdn.number.digit[i].msb = 0xf;
-			usim_data.msisdn.number.digit[i].lsb = 0xf;
+			usim_data->msisdn.number.digit[i].msb = 0xf;
+			usim_data->msisdn.number.digit[i].lsb = 0xf;
 		}
 	} else {
-		usim_data.msisdn.number.digit[strlen(msisdn) / 2].lsb = 0xf;
+		usim_data->msisdn.number.digit[strlen(msisdn) / 2].lsb = 0xf;
 		for (int i = (strlen(msisdn) / 2) + 1; i < 10; i++) {
-			usim_data.msisdn.number.digit[i].msb = 0xf;
-			usim_data.msisdn.number.digit[i].lsb = 0xf;
+			usim_data->msisdn.number.digit[i].msb = 0xf;
+			usim_data->msisdn.number.digit[i].lsb = 0xf;
 		}
 	}
 	/*
@@ -304,22 +310,22 @@ void gen_usim_data(int user_id) {
 	 */
 	for (int i = 0; i < oplmn_nb; i++) {
 		network_record_t record = user_network_record_list[oplmn[i]];
-		usim_data.pnn[i].fullname.type = USIM_PNN_FULLNAME_TAG;
-		usim_data.pnn[i].fullname.length = strlen(record.fullname);
-		strncpy((char*) usim_data.pnn[i].fullname.value, record.fullname,
-				usim_data.pnn[i].fullname.length);
-		usim_data.pnn[i].shortname.type = USIM_PNN_SHORTNAME_TAG;
-		usim_data.pnn[i].shortname.length = strlen(record.shortname);
-		strncpy((char*) usim_data.pnn[i].shortname.value, record.shortname,
-				usim_data.pnn[i].shortname.length);
-		usim_data.opl[i].plmn = record.plmn;
-		usim_data.opl[i].start = record.tac_start;
-		usim_data.opl[i].end = record.tac_end;
-		usim_data.opl[i].record_id = i;
+		usim_data->pnn[i].fullname.type = USIM_PNN_FULLNAME_TAG;
+		usim_data->pnn[i].fullname.length = strlen(record.fullname);
+		strncpy((char*) usim_data->pnn[i].fullname.value, record.fullname,
+				usim_data->pnn[i].fullname.length);
+		usim_data->pnn[i].shortname.type = USIM_PNN_SHORTNAME_TAG;
+		usim_data->pnn[i].shortname.length = strlen(record.shortname);
+		strncpy((char*) usim_data->pnn[i].shortname.value, record.shortname,
+				usim_data->pnn[i].shortname.length);
+		usim_data->opl[i].plmn = record.plmn;
+		usim_data->opl[i].start = record.tac_start;
+		usim_data->opl[i].end = record.tac_end;
+		usim_data->opl[i].record_id = i;
 	}
 	if (oplmn_nb < USIM_OPL_MAX) {
 		for (int i = oplmn_nb; i < USIM_OPL_MAX; i++) {
-			memset(&usim_data.opl[i].plmn, 0xff, sizeof(plmn_t));
+			memset(&usim_data->opl[i].plmn, 0xff, sizeof(plmn_t));
 		}
 	}
 
@@ -327,155 +333,162 @@ void gen_usim_data(int user_id) {
 	 * List of Equivalent HPLMNs
 	 */
 	for (int i = 0; i < ehplmn_nb; i++) {
-		usim_data.ehplmn[i] = user_network_record_list[ehplmn[i]].plmn;
+		usim_data->ehplmn[i] = user_network_record_list[ehplmn[i]].plmn;
 	}
 	if (ehplmn_nb < USIM_EHPLMN_MAX) {
 		for (int i = ehplmn_nb; i < USIM_EHPLMN_MAX; i++) {
-			memset(&usim_data.ehplmn[i], 0xff, sizeof(plmn_t));
+			memset(&usim_data->ehplmn[i], 0xff, sizeof(plmn_t));
 		}
 	}
 	/*
 	 * Home PLMN Selector with Access Technology
 	 */
-	usim_data.hplmn.plmn = user_network_record_list[hplmn_index].plmn;
-	usim_data.hplmn.AcT = (USIM_ACT_GSM | USIM_ACT_UTRAN | USIM_ACT_EUTRAN);
+	usim_data->hplmn.plmn = user_network_record_list[hplmn_index].plmn;
+	usim_data->hplmn.AcT = (USIM_ACT_GSM | USIM_ACT_UTRAN | USIM_ACT_EUTRAN);
 
 	/*
 	 * List of user controlled PLMN selector with Access Technology
 	 */
 	for (int i = 0; i < USIM_PLMN_MAX; i++) {
-		memset(&usim_data.plmn[i], 0xff, sizeof(plmn_t));
+		memset(&usim_data->plmn[i], 0xff, sizeof(plmn_t));
 	}
 	if (ucplmn_nb > 0) {
 		for (int i = 0; i < ucplmn_nb; i++) {
-			usim_data.plmn[i].plmn = user_network_record_list[ucplmn[i]].plmn;
+			usim_data->plmn[i].plmn = user_network_record_list[ucplmn[i]].plmn;
 		}
 	}
 
 	// List of operator controlled PLMN selector with Access Technology
 
 	for (int i = 0; i < USIM_OPLMN_MAX; i++) {
-		memset(&usim_data.oplmn[i], 0xff, sizeof(plmn_t));
+		memset(&usim_data->oplmn[i], 0xff, sizeof(plmn_t));
 	}
 	if (ocplmn_nb > 0) {
 		for (int i = 0; i < ocplmn_nb; i++) {
-			usim_data.oplmn[i].plmn = user_network_record_list[ocplmn[i]].plmn;
-			usim_data.oplmn[i].AcT = (USIM_ACT_GSM | USIM_ACT_UTRAN
+			usim_data->oplmn[i].plmn = user_network_record_list[ocplmn[i]].plmn;
+			usim_data->oplmn[i].AcT = (USIM_ACT_GSM | USIM_ACT_UTRAN
 					| USIM_ACT_EUTRAN);
 		}
 	}
 	/*
 	 * EPS Location Information
 	 */
-	usim_data.epsloci.guti.gummei.plmn =
+	usim_data->epsloci.guti.gummei.plmn =
 			user_network_record_list[hplmn_index].plmn;
-	usim_data.epsloci.guti.gummei.MMEgid = DEFAULT_MME_ID;
-	usim_data.epsloci.guti.gummei.MMEcode = DEFAULT_MME_CODE;
-	usim_data.epsloci.guti.m_tmsi = DEFAULT_M_TMSI;
-	usim_data.epsloci.tai.plmn = usim_data.epsloci.guti.gummei.plmn;
-	usim_data.epsloci.tai.tac = DEFAULT_TAC;
-	usim_data.epsloci.status = USIM_EPSLOCI_UPDATED;
+	usim_data->epsloci.guti.gummei.MMEgid = DEFAULT_MME_ID;
+	usim_data->epsloci.guti.gummei.MMEcode = DEFAULT_MME_CODE;
+	usim_data->epsloci.guti.m_tmsi = DEFAULT_M_TMSI;
+	usim_data->epsloci.tai.plmn = usim_data->epsloci.guti.gummei.plmn;
+	usim_data->epsloci.tai.tac = DEFAULT_TAC;
+	usim_data->epsloci.status = USIM_EPSLOCI_UPDATED;
 	/*
 	 * Non-Access Stratum configuration
 	 */
-	usim_data.nasconfig.NAS_SignallingPriority.type =
+	usim_data->nasconfig.NAS_SignallingPriority.type =
 	USIM_NAS_SIGNALLING_PRIORITY_TAG;
-	usim_data.nasconfig.NAS_SignallingPriority.length = 1;
-	usim_data.nasconfig.NAS_SignallingPriority.value[0] = 0x00;
-	usim_data.nasconfig.NMO_I_Behaviour.type = USIM_NMO_I_BEHAVIOUR_TAG;
-	usim_data.nasconfig.NMO_I_Behaviour.length = 1;
-	usim_data.nasconfig.NMO_I_Behaviour.value[0] = 0x00;
-	usim_data.nasconfig.AttachWithImsi.type = USIM_ATTACH_WITH_IMSI_TAG;
-	usim_data.nasconfig.AttachWithImsi.length = 1;
+	usim_data->nasconfig.NAS_SignallingPriority.length = 1;
+	usim_data->nasconfig.NAS_SignallingPriority.value[0] = 0x00;
+	usim_data->nasconfig.NMO_I_Behaviour.type = USIM_NMO_I_BEHAVIOUR_TAG;
+	usim_data->nasconfig.NMO_I_Behaviour.length = 1;
+	usim_data->nasconfig.NMO_I_Behaviour.value[0] = 0x00;
+	usim_data->nasconfig.AttachWithImsi.type = USIM_ATTACH_WITH_IMSI_TAG;
+	usim_data->nasconfig.AttachWithImsi.length = 1;
 #if defined(START_WITH_GUTI)
-	usim_data.nasconfig.AttachWithImsi.value[0] = 0x00;
+	usim_data->nasconfig.AttachWithImsi.value[0] = 0x00;
 #else
-	usim_data.nasconfig.AttachWithImsi.value[0] = 0x01;
+	usim_data->nasconfig.AttachWithImsi.value[0] = 0x01;
 #endif
-	usim_data.nasconfig.MinimumPeriodicSearchTimer.type =
+	usim_data->nasconfig.MinimumPeriodicSearchTimer.type =
 	USIM_MINIMUM_PERIODIC_SEARCH_TIMER_TAG;
-	usim_data.nasconfig.MinimumPeriodicSearchTimer.length = 1;
-	usim_data.nasconfig.MinimumPeriodicSearchTimer.value[0] = 0x00;
-	usim_data.nasconfig.ExtendedAccessBarring.type =
+	usim_data->nasconfig.MinimumPeriodicSearchTimer.length = 1;
+	usim_data->nasconfig.MinimumPeriodicSearchTimer.value[0] = 0x00;
+	usim_data->nasconfig.ExtendedAccessBarring.type =
 	USIM_EXTENDED_ACCESS_BARRING_TAG;
-	usim_data.nasconfig.ExtendedAccessBarring.length = 1;
-	usim_data.nasconfig.ExtendedAccessBarring.value[0] = 0x00;
-	usim_data.nasconfig.Timer_T3245_Behaviour.type =
+	usim_data->nasconfig.ExtendedAccessBarring.length = 1;
+	usim_data->nasconfig.ExtendedAccessBarring.value[0] = 0x00;
+	usim_data->nasconfig.Timer_T3245_Behaviour.type =
 	USIM_TIMER_T3245_BEHAVIOUR_TAG;
-	usim_data.nasconfig.Timer_T3245_Behaviour.length = 1;
-	usim_data.nasconfig.Timer_T3245_Behaviour.value[0] = 0x00;
+	usim_data->nasconfig.Timer_T3245_Behaviour.length = 1;
+	usim_data->nasconfig.Timer_T3245_Behaviour.value[0] = 0x00;
 
 	/* initialize the subscriber authentication security key */
-	hex_string_to_hex_value(usim_data.keys.usim_api_k,
+	hex_string_to_hex_value(usim_data->keys.usim_api_k,
 			usim_api_k, USIM_API_K_SIZE);
-	hex_string_to_hex_value(usim_data.keys.opc, opc,
+	hex_string_to_hex_value(usim_data->keys.opc, opc,
 	OPC_SIZE);
+}
 
-    char *path = make_filename(output_dir, USIM_API_NVRAM_FILENAME, user_id);
-    usim_api_write(path, &usim_data);
-    free(path);
+int write_usim_data(const char *directory, int user_id, usim_data_t *usim_data){
+    int rc;
+    char *filename = make_filename(directory, USIM_API_NVRAM_FILENAME, user_id);
+    rc = usim_api_write(filename, usim_data);
+    free(filename);
+    return rc;
 }
-void gen_emm_data(int user_id) {
+
+
+void gen_emm_data(int user_id, emm_nvdata_t *emm_data) {
 	hplmn_index = get_plmn_index(hplmn);
-	emm_nvdata_t emm_data;
-	int rc;
-	memset(&emm_data, 0, sizeof(emm_nvdata_t));
+	memset(emm_data, 0, sizeof(emm_nvdata_t));
 	int hplmn_index = get_plmn_index(hplmn);
-	emm_data.imsi.length = 8;
-	emm_data.imsi.u.num.parity = get_msin_parity(msin);
-	emm_data.imsi.u.num.digit1 = user_plmn_list[hplmn_index].mcc[0];
-	emm_data.imsi.u.num.digit2 = user_plmn_list[hplmn_index].mcc[1];
-	emm_data.imsi.u.num.digit3 = user_plmn_list[hplmn_index].mcc[2];
+	emm_data->imsi.length = 8;
+	emm_data->imsi.u.num.parity = get_msin_parity(msin);
+	emm_data->imsi.u.num.digit1 = user_plmn_list[hplmn_index].mcc[0];
+	emm_data->imsi.u.num.digit2 = user_plmn_list[hplmn_index].mcc[1];
+	emm_data->imsi.u.num.digit3 = user_plmn_list[hplmn_index].mcc[2];
 
-	emm_data.imsi.u.num.digit4 = user_plmn_list[hplmn_index].mnc[0];
-	emm_data.imsi.u.num.digit5 = user_plmn_list[hplmn_index].mnc[1];
+	emm_data->imsi.u.num.digit4 = user_plmn_list[hplmn_index].mnc[0];
+	emm_data->imsi.u.num.digit5 = user_plmn_list[hplmn_index].mnc[1];
 
 	if (strlen(user_plmn_list[hplmn_index].mnc) == 3) {
-		emm_data.rplmn.MNCdigit3 = user_plmn_list[hplmn_index].mnc[2];
-
-		emm_data.imsi.u.num.digit6 = user_plmn_list[hplmn_index].mnc[2];
-		emm_data.imsi.u.num.digit7 = msin[0];
-		emm_data.imsi.u.num.digit8 = msin[1];
-		emm_data.imsi.u.num.digit9 = msin[2];
-		emm_data.imsi.u.num.digit10 = msin[3];
-		emm_data.imsi.u.num.digit11 = msin[4];
-		emm_data.imsi.u.num.digit12 = msin[5];
-		emm_data.imsi.u.num.digit13 = msin[6];
-		emm_data.imsi.u.num.digit14 = msin[7];
-		emm_data.imsi.u.num.digit15 = msin[8];
+		emm_data->rplmn.MNCdigit3 = user_plmn_list[hplmn_index].mnc[2];
+
+		emm_data->imsi.u.num.digit6 = user_plmn_list[hplmn_index].mnc[2];
+		emm_data->imsi.u.num.digit7 = msin[0];
+		emm_data->imsi.u.num.digit8 = msin[1];
+		emm_data->imsi.u.num.digit9 = msin[2];
+		emm_data->imsi.u.num.digit10 = msin[3];
+		emm_data->imsi.u.num.digit11 = msin[4];
+		emm_data->imsi.u.num.digit12 = msin[5];
+		emm_data->imsi.u.num.digit13 = msin[6];
+		emm_data->imsi.u.num.digit14 = msin[7];
+		emm_data->imsi.u.num.digit15 = msin[8];
 
 	} else {
-		emm_data.rplmn.MNCdigit3 = 0xf;
+		emm_data->rplmn.MNCdigit3 = 0xf;
 
-		emm_data.imsi.u.num.digit6 = msin[0];
-		emm_data.imsi.u.num.digit7 = msin[1];
-		emm_data.imsi.u.num.digit8 = msin[2];
-		emm_data.imsi.u.num.digit9 = msin[3];
-		emm_data.imsi.u.num.digit10 = msin[4];
-		emm_data.imsi.u.num.digit11 = msin[5];
-		emm_data.imsi.u.num.digit12 = msin[6];
-		emm_data.imsi.u.num.digit13 = msin[7];
-		emm_data.imsi.u.num.digit14 = msin[8];
-		emm_data.imsi.u.num.digit15 = msin[9];
+		emm_data->imsi.u.num.digit6 = msin[0];
+		emm_data->imsi.u.num.digit7 = msin[1];
+		emm_data->imsi.u.num.digit8 = msin[2];
+		emm_data->imsi.u.num.digit9 = msin[3];
+		emm_data->imsi.u.num.digit10 = msin[4];
+		emm_data->imsi.u.num.digit11 = msin[5];
+		emm_data->imsi.u.num.digit12 = msin[6];
+		emm_data->imsi.u.num.digit13 = msin[7];
+		emm_data->imsi.u.num.digit14 = msin[8];
+		emm_data->imsi.u.num.digit15 = msin[9];
 
 	}
 
-	emm_data.rplmn.MCCdigit1 = user_plmn_list[hplmn_index].mcc[0];
-	emm_data.rplmn.MCCdigit2 = user_plmn_list[hplmn_index].mcc[1];
-	emm_data.rplmn.MCCdigit3 = user_plmn_list[hplmn_index].mcc[2];
-	emm_data.rplmn.MNCdigit1 = user_plmn_list[hplmn_index].mnc[0];
-	emm_data.rplmn.MNCdigit2 = user_plmn_list[hplmn_index].mnc[1];
+	emm_data->rplmn.MCCdigit1 = user_plmn_list[hplmn_index].mcc[0];
+	emm_data->rplmn.MCCdigit2 = user_plmn_list[hplmn_index].mcc[1];
+	emm_data->rplmn.MCCdigit3 = user_plmn_list[hplmn_index].mcc[2];
+	emm_data->rplmn.MNCdigit1 = user_plmn_list[hplmn_index].mnc[0];
+	emm_data->rplmn.MNCdigit2 = user_plmn_list[hplmn_index].mnc[1];
 
-	emm_data.eplmn.n_plmns = ehplmn_nb;
+	emm_data->eplmn.n_plmns = ehplmn_nb;
+}
 
-	char* path = make_filename(output_dir, EMM_NVRAM_FILENAME, user_id);
-	rc = memory_write(path, &emm_data, sizeof(emm_nvdata_t));
-	free(path);
+int write_emm_data(const char *directory, int user_id, emm_nvdata_t *emm_data) {
+    int rc;
+	char* filename = make_filename(directory, EMM_NVRAM_FILENAME, user_id);
+	rc = memory_write(filename, emm_data, sizeof(emm_nvdata_t));
+	free(filename);
 	if (rc != RETURNok) {
 		perror("ERROR\t: memory_write() failed");
 		exit(EXIT_FAILURE);
 	}
-
+    return(EXIT_SUCCESS);
 }
 
 int parse_plmn_param(config_setting_t *plmn_setting, int index) {
@@ -632,9 +645,8 @@ int parse_ue_sim_param(config_setting_t *ue_setting, int user_id) {
 	return EXIT_SUCCESS;
 }
 
-int parse_ue_user_param(config_setting_t *ue_setting, int user_id) {
+int parse_ue_user_param(config_setting_t *ue_setting, int user_id, user_nvdata_t *user_data) {
 	config_setting_t *ue_param_setting = NULL;
-	user_nvdata_t user_data;
 	const char* imei = NULL;
 	const char* manufacturer = NULL;
 	const char* model = NULL;
@@ -667,29 +679,34 @@ int parse_ue_user_param(config_setting_t *ue_setting, int user_id) {
 		printf("Check USER PIN for UE%d FULLNAME. Exiting\n", user_id);
 		return EXIT_FAILURE;
 	}
-	memset(&user_data, 0, sizeof(user_nvdata_t));
-	snprintf(user_data.IMEI, USER_IMEI_SIZE + 1, "%s%d", imei, _luhn(imei));
+
+	memset(user_data, 0, sizeof(user_nvdata_t));
+	snprintf(user_data->IMEI, USER_IMEI_SIZE + 1, "%s%d", imei, _luhn(imei));
 	/*
 	 * Manufacturer identifier
 	 */
-	strncpy(user_data.manufacturer, manufacturer, USER_MANUFACTURER_SIZE);
+	strncpy(user_data->manufacturer, manufacturer, USER_MANUFACTURER_SIZE);
 	/*
 	 * Model identifier
 	 */
-	strncpy(user_data.model, model, USER_MODEL_SIZE);
+	strncpy(user_data->model, model, USER_MODEL_SIZE);
 	/*
 	 * SIM Personal Identification Number
 	 */
-	strncpy(user_data.PIN, pin, USER_PIN_SIZE);
+	strncpy(user_data->PIN, pin, USER_PIN_SIZE);
 
-	char* path = make_filename(output_dir, USER_NVRAM_FILENAME, user_id);
-	rc = memory_write(path, &user_data, sizeof(user_nvdata_t));
-    free(path);
+	return EXIT_SUCCESS;
+}
+
+void write_user_data(const char *directory, int user_id, user_nvdata_t *data) {
+    int rc;
+	char* filename = make_filename(directory, USER_NVRAM_FILENAME, user_id);
+	rc = memory_write(filename, data, sizeof(user_nvdata_t));
+    free(filename);
 	if (rc != RETURNok) {
 		perror("ERROR\t: memory_write() failed");
 		exit(EXIT_FAILURE);
 	}
-	return EXIT_SUCCESS;
 }
 
 int fill_ucplmn(config_setting_t* setting, int user_id) {
diff --git a/openair3/NAS/TOOLS/conf2uedata.h b/openair3/NAS/TOOLS/conf2uedata.h
index 98c4752743ef2f1d828d03503ef346c17b3b0f1d..1aee521e79a6cfc25c5ec95732c4a47386fabb67 100644
--- a/openair3/NAS/TOOLS/conf2uedata.h
+++ b/openair3/NAS/TOOLS/conf2uedata.h
@@ -2,7 +2,10 @@
 #define _CONF2UEDATA_H
 
 #include <libconfig.h>
+
 #include "emmData.h"
+#include "usim_api.h"
+#include "userDef.h"
 
 #define USER "USER"
 #define UE "UE"
@@ -70,8 +73,6 @@ typedef struct {
 	const char *mcc;
 } plmn_conf_param_t;
 
-extern const char* output_dir;
-
 extern const char *msin;
 extern const char *usim_api_k;
 extern const char *msisdn;
@@ -96,16 +97,21 @@ extern plmn_conf_param_t* user_plmn_list;
 extern network_record_t* user_network_record_list;
 
 int get_config_from_file(const char *filename, config_t *config);
-int parse_config_file(const char *filename);
+int parse_config_file(const char *output_dir, const char *filename);
 
 void _display_usage(void);
-void gen_emm_data(int user_id) ;
-void gen_usim_data(int user_id);
+void gen_emm_data(int user_id, emm_nvdata_t *emm_data);
 void fill_network_record_list(void);
 
+int parse_ue_user_param(config_setting_t *ue_setting, int user_id, user_nvdata_t *user_data);
+void write_user_data(const char *directory, int user_id, user_nvdata_t *data);
+int write_emm_data(const char *directory, int user_id, emm_nvdata_t *emm_data);
+int write_usim_data(const char *directory, int user_id, usim_data_t *usim_data);
+void gen_usim_data(usim_data_t *usim_data);
+
+
 int _luhn(const char* cc);
 
-int parse_ue_user_param(config_setting_t *ue_setting, int user_id);
 int parse_ue_sim_param(config_setting_t *ue_setting, int user_id);
 int parse_plmn_param(config_setting_t *plmn_setting, int index);
 int parse_plmns(config_setting_t *all_plmn_setting);