Index: trunk/psModules/src/camera/pmFPARead.c
===================================================================
--- trunk/psModules/src/camera/pmFPARead.c	(revision 7274)
+++ trunk/psModules/src/camera/pmFPARead.c	(revision 7278)
@@ -27,4 +27,9 @@
                         )
 {
+    assert(readout);
+    assert(image);
+    assert(trimsec);
+    assert(biassecs);
+
     // The image corresponding to the trim region
     if (psRegionIsBad(*trimsec)) {
@@ -85,4 +90,7 @@
                              )
 {
+    assert(fits);
+    assert(region);
+
     bool resize = false;                // Do we need to resize the image once read?
     psRegion toRead = psRegionSet(region->x0, region->x1, region->y0, region->y1); // Region to read
@@ -158,4 +166,9 @@
                       )
 {
+    PS_ASSERT_PTR_NON_NULL(readout, false);
+    PS_ASSERT_PTR_NON_NULL(fits, false);
+    PS_ASSERT_INT_NONNEGATIVE(z, false);
+    PS_ASSERT_INT_NONNEGATIVE(numScans, false);
+
     // Get the HDU and read the header
     pmCell *cell = readout->parent;     // The parent cell
@@ -298,4 +311,7 @@
                )
 {
+    PS_ASSERT_PTR_NON_NULL(cell, false);
+    PS_ASSERT_PTR_NON_NULL(fits, false);
+
     pmHDU *hdu = pmHDUFromCell(cell);   // The HDU
     if (!hdu) {
@@ -345,4 +361,7 @@
                )
 {
+    PS_ASSERT_PTR_NON_NULL(chip, false);
+    PS_ASSERT_PTR_NON_NULL(fits, false);
+
     bool success = false;               // Were we able to read at least one HDU?
     psArray *cells = chip->cells;       // Array of cells
@@ -366,4 +385,7 @@
               )
 {
+    PS_ASSERT_PTR_NON_NULL(fpa, false);
+    PS_ASSERT_PTR_NON_NULL(fits, false);
+
     bool success = false;               // Were we able to read at least one HDU?
     psArray *chips = fpa->chips;        // Array of chips