Index: mucs.c
===================================================================
--- mucs.c	(revision 13471)
+++ mucs.c	(revision 13472)
@@ -71,7 +71,7 @@
 																	"This file could be generated by mucs-pcb\n",
 																default_file, ".l1", "unixplot", HID_FILESELECT_READ);
 		if (fname == NULL)
-			PCB_ACT_FAIL(LoadMucsFrom);
+			return 1;
 		if (default_file != NULL) {
 			free(default_file);
 			default_file = NULL;