Index: /trunk/ppMerge/src/ppMergeCombine.c
===================================================================
--- /trunk/ppMerge/src/ppMergeCombine.c	(revision 10300)
+++ /trunk/ppMerge/src/ppMergeCombine.c	(revision 10301)
@@ -135,14 +135,8 @@
             // Put version metadata into header
             pmHDU *hdu = pmHDUFromCell(cell);
-            if (!hdu) {
-                psError(PS_ERR_UNEXPECTED_NULL, true, "Unable to find HDU for chip %d cell %d.\n",
-                        view->chip, view->cell);
-                return false;
-            }
-            if (hdu != lastHDU) {
+            if (hdu && hdu != lastHDU) {
                 ppMergeVersionMetadata(hdu->header);
                 lastHDU = hdu;
             }
-
 
             do {