diff --git a/src/s1ap/asn1c/asnGenFiles/CauseNas.h b/src/s1ap/asn1c/asnGenFiles/CauseNas.h
new file mode 100644
index 0000000..0e24347
--- /dev/null
+++ b/src/s1ap/asn1c/asnGenFiles/CauseNas.h
@@ -0,0 +1,59 @@
+/*
+ * Generated by asn1c-0.9.29 (http://lionet.info/asn1c)
+ * From ASN.1 module "S1AP-IEs"
+ * 	found in "./asn1c/S1AP-IEs.asn"
+ * 	`asn1c -fcompound-names -fno-include-deps -gen-PER -findirect-choice -pdu=S1AP-PDU`
+ */
+
+#ifndef	_CauseNas_H_
+#define	_CauseNas_H_
+
+
+#include <asn_application.h>
+
+/* Including external dependencies */
+#include <NativeEnumerated.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Dependencies */
+typedef enum CauseNas {
+	CauseNas_normal_release	= 0,
+	CauseNas_authentication_failure	= 1,
+	CauseNas_detach	= 2,
+	CauseNas_unspecified	= 3,
+	/*
+	 * Enumeration is extensible
+	 */
+	CauseNas_csg_subscription_expiry	= 4
+} e_CauseNas;
+
+/* CauseNas */
+typedef long	 CauseNas_t;
+
+/* Implementation */
+extern asn_per_constraints_t asn_PER_type_CauseNas_constr_1;
+extern asn_TYPE_descriptor_t asn_DEF_CauseNas;
+extern const asn_INTEGER_specifics_t asn_SPC_CauseNas_specs_1;
+asn_struct_free_f CauseNas_free;
+asn_struct_print_f CauseNas_print;
+asn_constr_check_f CauseNas_constraint;
+ber_type_decoder_f CauseNas_decode_ber;
+der_type_encoder_f CauseNas_encode_der;
+xer_type_decoder_f CauseNas_decode_xer;
+xer_type_encoder_f CauseNas_encode_xer;
+oer_type_decoder_f CauseNas_decode_oer;
+oer_type_encoder_f CauseNas_encode_oer;
+per_type_decoder_f CauseNas_decode_uper;
+per_type_encoder_f CauseNas_encode_uper;
+per_type_decoder_f CauseNas_decode_aper;
+per_type_encoder_f CauseNas_encode_aper;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* _CauseNas_H_ */
+#include <asn_internal.h>