Index: trunk/ppImage/src/ppImageParseCamera.c
===================================================================
--- trunk/ppImage/src/ppImageParseCamera.c	(revision 8934)
+++ trunk/ppImage/src/ppImageParseCamera.c	(revision 9342)
@@ -48,4 +48,11 @@
         pmFPAfileDefineFromDetDB (&status, config, "PPIMAGE.MASK", input->fpa, PM_DETREND_TYPE_MASK);
         if (!status) psAbort ("ppImageParseDetrend", "can't find a mask image source");
+    }
+    if (options->doShutter) {
+        bool status = false;
+        pmFPAfileDefineFromArgs  (&status, config, "PPIMAGE.SHUTTER", "SHUTTER");
+        pmFPAfileDefineFromConf  (&status, config, "PPIMAGE.SHUTTER");
+        pmFPAfileDefineFromDetDB (&status, config, "PPIMAGE.SHUTTER", input->fpa, PM_DETREND_TYPE_FLAT);
+        if (!status) psAbort ("ppImageParseDetrend", "can't find a shutter image source");
     }
     if (options->doFlat) {