--- cups-1.3rc2/scheduler/client.c.command-error	2007-08-10 10:33:18.000000000 +0100
+++ cups-1.3rc2/scheduler/client.c	2007-08-10 10:37:44.000000000 +0100
@@ -2266,6 +2266,13 @@
 {
   int	fd;				/* Standard input file descriptor */
 
+  if (access(command, X_OK) != 0)
+  {
+    cupsdLogMessage(CUPS_LOG_ERROR,
+		    "cupsdSendCommand: %d Unable to execute \"%s\"",
+		    con->http.fd, command)
+      return (0);
+  }
 
   if (con->filename)
   {