Index: imagecache.module
===================================================================
--- imagecache.module
+++ imagecache.module
@@ -563,6 +563,10 @@
   }
 
   if (!$image = imageapi_image_open($src)) {
+    $replace = array(
+      '!config_page' => l('configuration page', 'admin/settings/imageapi'),
+    );
+    watchdog('imagecache', 'There is no ImageAPI toolkit enabled.  Go to the !config_page to enable an ImageAPI toolkit.', $replace, WATCHDOG_ERROR);
     return FALSE;
   }