Index: trunk/psModules/src/detrend/pmShutterCorrection.c
===================================================================
--- trunk/psModules/src/detrend/pmShutterCorrection.c	(revision 12558)
+++ trunk/psModules/src/detrend/pmShutterCorrection.c	(revision 12559)
@@ -589,7 +589,9 @@
     psFree(refs);
 
-    psFits *fits = psFitsOpen("pattern.fits", "w");
-    psFitsWriteImage(fits, NULL, pattern, 0, NULL);
-    psFitsClose(fits);
+    if (psTraceGetLevel("psModules.detrend") > 5) {
+	psFits *fits = psFitsOpen("pattern.fits", "w");
+	psFitsWriteImage(fits, NULL, pattern, 0, NULL);
+	psFitsClose(fits);
+    }
     psFree(pattern);