Index: trunk/psModules/src/imcombine/pmSubtractionMatch.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 20717)
+++ trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 20718)
@@ -210,20 +210,9 @@
     pmSubtractionStampList *stamps = NULL; // Stamps for matching PSF
     pmSubtractionKernels *kernels = NULL; // Kernel basis functions
+    psMetadata *analysis = psMetadataAlloc(); // QA data
 
     int numCols = ro1->image->numCols, numRows = ro1->image->numRows; // Image dimensions
 
     psRandom *rng = psRandomAlloc(PS_RANDOM_TAUS, 0); // Random number generator
-
-    {
-        psStats *bg = psStatsAlloc(PS_STAT_ROBUST_MEDIAN | PS_STAT_ROBUST_STDEV); // Statistics for backgroun
-        if (!psImageBackground(bg, NULL, ro1->image, ro1->mask, maskVal, rng)) {
-            psError(PS_ERR_UNKNOWN, false, "Unable to measure background statistics.");
-            psFree(bg);
-            psFree(rng);
-            goto MATCH_ERROR;
-        }
-        threshold = bg->robustMedian + threshold * bg->robustStdev;
-        psFree(bg);
-    }
 
     memCheck("start");
@@ -233,6 +222,5 @@
     if (!subMask) {
         psError(PS_ERR_UNKNOWN, false, "Unable to generate subtraction mask.");
-        psFree(weight);
-        return false;
+        goto MATCH_ERROR;
     }
 
@@ -250,5 +238,15 @@
     }
 
-    psMetadata *analysis = psMetadataAlloc(); // QA data
+    {
+        psStats *bg = psStatsAlloc(PS_STAT_ROBUST_MEDIAN | PS_STAT_ROBUST_STDEV); // Statistics for backgroun
+        if (!psImageBackground(bg, NULL, ro1->image, ro1->mask, maskVal, rng)) {
+            psError(PS_ERR_UNKNOWN, false, "Unable to measure background statistics.");
+            psFree(bg);
+            psFree(rng);
+            goto MATCH_ERROR;
+        }
+        threshold = bg->robustMedian + threshold * bg->robustStdev;
+        psFree(bg);
+    }
 
     // Iterate over iso-kernel regions