Index: libcfa/src/concurrency/exception.cfa
===================================================================
--- libcfa/src/concurrency/exception.cfa	(revision e1358c0ea59c560c010e5261b3e1fe2ac3ad8a2c)
+++ libcfa/src/concurrency/exception.cfa	(revision 3c1e432e03fc7000fa2ea67c625568252cf4272c)
@@ -9,7 +9,7 @@
 // Author           : Andrew Beach
 // Created On       : Mon Aug 17 10:41:00 2020
-// Last Modified By : Andrew Beach
-// Last Modified On : Wed Oct 28 14:34:00 2020
-// Update Count     : 1
+// Last Modified By : Peter A. Buhr
+// Last Modified On : Wed Sep 25 17:25:37 2024
+// Update Count     : 15
 //
 
@@ -46,5 +46,11 @@
 
 STOP_AT_END_FUNCTION(main_cancelstop,
-	abort();
+	abort(
+		"Propagation failed to find a matching handler.\n"
+		"Possible cause is a missing try block with appropriate catch clause for the specified or derived exception type.\n"
+		"Last exception name or message: %%s.\n"
+//		NODE_TO_EXCEPT( UNWIND_TO_NODE( unwind_exception ) )->
+//			virtual_table->msg( NODE_TO_EXCEPT( UNWIND_TO_NODE( unwind_exception ) ) )
+		);
 )
 
@@ -59,5 +65,5 @@
     dst->cancellation = 1p;
 	$ctx_switch( src, dst );
-	abort();
+	abort( "coroutine_cancelstop" );
 )