Index: trunk/ppMerge/src/ppMergeCombine.c
===================================================================
--- trunk/ppMerge/src/ppMergeCombine.c	(revision 15651)
+++ trunk/ppMerge/src/ppMergeCombine.c	(revision 15654)
@@ -120,9 +120,7 @@
     while ((chip = pmFPAviewNextChip(view, fpa, 1))) {
         if (chip->hdu) {
+            // Data will exist soon
             pmFPAUpdateNames(data->out, chip, NULL);
-            if (chip->hdu->header) {
-                // Data will exist soon
-                chip->data_exists = true;
-            }
+            chip->data_exists = true;
         }
         pmChipWrite(chip, data->outFile, config->database, true, false); // Write header only
@@ -131,9 +129,7 @@
             cellNum++;
             if (cell->hdu) {
+                // Data will exist soon
                 pmFPAUpdateNames(data->out, chip, cell);
-                if (cell->hdu->header) {
-                    // Data will exist soon
-                    chip->data_exists = true;
-                }
+                chip->data_exists = cell->data_exists = true;
             }
             pmCellWrite(cell, data->outFile, config->database, true); // Write header only