Index: trunk/ppSim/src/ppSimLoop.c
===================================================================
--- trunk/ppSim/src/ppSimLoop.c	(revision 13022)
+++ trunk/ppSim/src/ppSimLoop.c	(revision 13283)
@@ -666,4 +666,6 @@
 
                 psFree(rowBias);
+
+                readout->data_exists = true;
                 psFree(readout);        // Drop reference
             }
@@ -688,4 +690,5 @@
                                               xParityCell * xParityChip, yParityCell * yParityChip);
             }
+            cell->data_exists = true;
 
             if (!pmFPAfileIOChecks(config, view, PM_FPA_AFTER)) {
@@ -704,4 +707,5 @@
                                           xParityChip, yParityChip);
         }
+        chip->data_exists = true;
 
         if (!pmFPAfileIOChecks(config, view, PM_FPA_AFTER)) {