Index: trunk/psModules/src/camera/pmFPAHeader.c
===================================================================
--- trunk/psModules/src/camera/pmFPAHeader.c	(revision 7017)
+++ trunk/psModules/src/camera/pmFPAHeader.c	(revision 7274)
@@ -56,4 +56,7 @@
                      )
 {
+    PS_ASSERT_PTR_NON_NULL(cell, false);
+    PS_ASSERT_PTR_NON_NULL(fits, false);
+
     if (!cell->hdu) {
         return pmChipReadHeader(cell->parent, fits);
@@ -72,4 +75,7 @@
                      )
 {
+    PS_ASSERT_PTR_NON_NULL(chip, false);
+    PS_ASSERT_PTR_NON_NULL(fits, false);
+
     if (!chip->hdu) {
         return pmFPAReadHeader(chip->parent, fits);
@@ -88,4 +94,7 @@
                     )
 {
+    PS_ASSERT_PTR_NON_NULL(fpa, false);
+    PS_ASSERT_PTR_NON_NULL(fits, false);
+
     if (!fpa->hdu) {
         return false;