diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 15d83da..1c02cb6 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -837,7 +837,15 @@
 
 private function f_vty_msc_allow_attach(TELNETasp_PT pt, my_BooleanList allow_attach_list)
 {
+	var charstring config := f_vty_transceive_ret(pt, "show running-config");
+
 	for (var integer msc_nr := 0; msc_nr < sizeof(allow_attach_list); msc_nr := msc_nr+1) {
+		if (f_strstr(config, "\nmsc " & int2str(msc_nr) & "\n") < 0) {
+			/* There is no 'msc N' for this msc_nr in the running config, so don't create an empty msc by
+			 * stepping into that config node. */
+			log("msc ", msc_nr, " is not configured, skipping");
+			continue;
+		}
 		f_vty_enter_cfg_msc(pt, msc_nr);
 		if (allow_attach_list[msc_nr]) {
 			/* strict := false: ignore if osmo-bsc does not support this config option (latest build) */