mangle_tt_sri_sm: fix get_tcap_operation for returnError
diff --git a/src/mangle_tt_sri_sm.erl b/src/mangle_tt_sri_sm.erl
index 33e452c..e2ebc4a 100644
--- a/src/mangle_tt_sri_sm.erl
+++ b/src/mangle_tt_sri_sm.erl
@@ -142,6 +142,12 @@
 	{returnResult, undefined};
 get_tcap_operation(#'MapSpecificPDUs_end_components_SEQOF_basicROS_returnResult'{result=Res}) ->
 	{returnResult, Res#'MapSpecificPDUs_end_components_SEQOF_basicROS_returnResult_result'.opcode};
+get_tcap_operation(#'MapSpecificPDUs_begin_components_SEQOF_basicROS_returnError'{}) ->
+	{returnError, undefined};
+get_tcap_operation(#'MapSpecificPDUs_continue_components_SEQOF_basicROS_returnError'{}) ->
+	{returnError, undefined};
+get_tcap_operation(#'MapSpecificPDUs_end_components_SEQOF_basicROS_returnError'{}) ->
+	{returnError, undefined};
 get_tcap_operation(#'MapSpecificPDUs_begin_components_SEQOF_returnResultNotLast'{result=Res}) ->
 	{returnResult, Res#'MapSpecificPDUs_begin_components_SEQOF_returnResultNotLast_result'.opcode};
 get_tcap_operation(#'MapSpecificPDUs_continue_components_SEQOF_returnResultNotLast'{result=Res}) ->