Index: trunk/psModules/src/camera/pmHDUGenerate.c
===================================================================
--- trunk/psModules/src/camera/pmHDUGenerate.c	(revision 7257)
+++ trunk/psModules/src/camera/pmHDUGenerate.c	(revision 7278)
@@ -437,4 +437,6 @@
                          )
 {
+    PS_ASSERT_PTR_NON_NULL(cell, false);
+
     // Get the HDU and a list of cells below it
     pmHDU *hdu = pmHDUFromCell(cell); // The HDU in the cell
@@ -487,4 +489,6 @@
                          )
 {
+    PS_ASSERT_PTR_NON_NULL(chip, false);
+
     // Get the HDU and a list of cells below it
     pmHDU *hdu = pmHDUFromChip(chip);   // The HDU in the chip
@@ -536,4 +540,6 @@
                         )
 {
+    PS_ASSERT_PTR_NON_NULL(fpa, false);
+
     // Get the HDU and a list of cells below it
     pmHDU *hdu = pmHDUFromFPA(fpa);     // The HDU in the FPA