diff --git a/library/BSSGP_Emulation.ttcnpp b/library/BSSGP_Emulation.ttcnpp
index 4af5f82..04220ed 100644
--- a/library/BSSGP_Emulation.ttcnpp
+++ b/library/BSSGP_Emulation.ttcnpp
@@ -25,6 +25,7 @@
 import from BSSGP_Types all;
 import from Osmocom_Gb_Types all;
 import from IPL4asp_Types all;
+import from Misc_Helpers all;
 
 #ifdef BSSGP_EM_L3
 import from MobileL3_GMM_SM_Types all;
@@ -591,8 +592,8 @@
 	} else if (ischosen(l3_mo.msgs.sms)) {
 		return c_LLC_SAPI_LLSMS;
 	}
-	setverdict(fail, "No LLC SAPI for ", l3_mo);
-	mtc.stop;
+	Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("No LLC SAPI for ", l3_mo));
+	return '0000'B;
 }
 
 private function f_llc_sapi_by_l3_mt(PDU_L3_SGSN_MS l3_mt) return BIT4 {
@@ -603,8 +604,8 @@
 	} else if (ischosen(l3_mt.msgs.sms)) {
 		return c_LLC_SAPI_LLSMS;
 	}
-	setverdict(fail, "No LLC SAPI for ", l3_mt);
-	mtc.stop;
+	Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("No LLC SAPI for ", l3_mt));
+	return '0000'B;
 }
 #endif
 
@@ -830,8 +831,7 @@
 
 /* Default Create Callback function: Fail and terminate */
 function DefaultCreateCallback(BssgpBvci bvci, BssgpCellId cell_id, OCT4 tlli, BssgpDecoded dec) runs on BSSGP_BVC_CT {
-	setverdict(fail, "Couldn't find Component for TLLI ", tlli);
-	mtc.stop;
+	Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Couldn't find Component for TLLI ", tlli));
 }
 
 /*
@@ -874,9 +874,10 @@
 	for (i := 0; i < sizeof(ClientTable); i := i+1) {
 		if (isvalue(ClientTable[i].imsi) and ClientTable[i].imsi == imsi) {
 			if (ClientTable[i].comp_ref != vc_conn) {
-				setverdict(fail, "Cannot unregister index=", i, " IMSI ", imsi, " registred to ",
-					   ClientTable[i].comp_ref, " from ", vc_conn);
-				mtc.stop;
+				Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail,
+							log2str("Cannot unregister index=", i, " IMSI ",
+								imsi, " registred to ", ClientTable[i].comp_ref,
+								" from ", vc_conn));
 			}
 			log("Removing Client IMSI=", imsi, ", index=", i);
 			ClientTable[i] := {
@@ -919,8 +920,8 @@
 			return ClientTable[i].comp_ref;
 		}
 	}
-	setverdict(fail, "Couldn't find Component for IMSI ", imsi);
-	mtc.stop;
+	Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Couldn't find Component for IMSI ", imsi));
+	return ClientTable[0].comp_ref;
 }
 
 private function f_tbl_comp_by_tlli(OCT4 tlli) runs on BSSGP_BVC_CT return BSSGP_Client_CT {
@@ -942,8 +943,8 @@
 			return i;
 		}
 	}
-	setverdict(fail, "Couldn't find Client for Component ", comp_ref);
-	mtc.stop;
+	Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Couldn't find Client for Component ", comp_ref));
+	return 1;
 }
 
 private function f_tbl_tlli_by_comp(BSSGP_Client_CT comp_ref) runs on BSSGP_BVC_CT return OCT4 {
@@ -954,8 +955,8 @@
 			return ClientTable[i].tlli;
 		}
 	}
-	setverdict(fail, "Couldn't find TLLI for Component ", comp_ref);
-	mtc.stop;
+	Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, log2str("Couldn't find TLLI for Component ", comp_ref));
+	return '00000000'O;
 }
 
 /* PDU_BSSGP enhanced with LLC and possibly L3 decoded payloads */