Index: trunk/psModules/src/imcombine/pmReadoutCombine.c
===================================================================
--- trunk/psModules/src/imcombine/pmReadoutCombine.c	(revision 12654)
+++ trunk/psModules/src/imcombine/pmReadoutCombine.c	(revision 12693)
@@ -369,5 +369,16 @@
 
             // Combination
-            psVectorStats(stats, pixels, errors, mask, 1);
+            if (!psVectorStats(stats, pixels, errors, mask, 1)) {
+                psError(PS_ERR_UNKNOWN, false, "Error in statistics.");
+                psFree(index);
+                psFree(pixels);
+                psFree(mask);
+                psFree(weights);
+                psFree(errors);
+                psFree(stats);
+                psFree(invScale);
+                return false;
+            }
+
             outputImage[yOut][xOut] = psStatsGetValue(stats, params->combine);
             if (params->weights) {