Index: mtut.scm
==================================================================
--- mtut.scm
+++ mtut.scm
@@ -380,11 +380,12 @@
 		 ;; look in runstarts for matching runs by target and contour
 		 ;; get the timestamp for when that run started and pass it
 		 ;; to the rule logic here where "ruletype" will be applied
 		 ;; if it comes back "changed" then proceed to register the runs
 		 
-		 (case (string->symbol ruletype)
+		 (case (string->symbol (or ruletype "no-such-rule"))
+                   ((no-such-rule) (print "ERROR: no such rule for " sense))
 		   ((scheduled)
 		    (if (not (alist-ref 'cron val-alist)) ;; gotta have cron spec
 			(print "ERROR: bad sense spec \"" (string-intersperse sense " ") "\" params: " val-alist)
 			(let* ((run-name (alist-ref 'run-name val-alist))
 			       (crontab  (alist-ref 'cron     val-alist))