int ret_constr = asn_check_constraints(&asn_DEF_E2AP_PDU, (void *) _e2ap_pdu_obj, _errbuf, &_errbuf_len);
if(ret_constr){
_error_string.assign(_errbuf, _errbuf_len);
int ret_constr = asn_check_constraints(&asn_DEF_E2AP_PDU, (void *) _e2ap_pdu_obj, _errbuf, &_errbuf_len);
if(ret_constr){
_error_string.assign(_errbuf, _errbuf_len);