Index: q921.c
===================================================================
--- q921.c	(revision 801)
+++ q921.c	(working copy)
@@ -894,6 +894,12 @@
 		/* Go to master */
 		for (sub = pri; sub->master; sub = sub->master);
 		tei = 64;
+
+/*! \todo XXX Workaround for the "The following loop never terminates" error below */
+		if(sub->subchannel) {
+			pri_error(pri, "nt_ptmp todo: Only one call is possible. TEI %d\n", tei);
+			return NULL;
+		}
 /*! \todo XXX Error:  The following loop never terminates! */
 		while(sub->subchannel) {
 			if(sub->subchannel->tei == tei)