Index: trunk/psModules/src/camera/pmFPARead.c
===================================================================
--- trunk/psModules/src/camera/pmFPARead.c	(revision 14950)
+++ trunk/psModules/src/camera/pmFPARead.c	(revision 16230)
@@ -405,4 +405,5 @@
     if (!hdu || hdu->blankPHU) {
         // XXX is this an error condition?
+        psTrace("psModules.camera", 7, "no HDU or pixel-less PHU: skipping\n");
         *status = true;
         return false;
@@ -452,4 +453,5 @@
     if (naxis == 0) {
         // No pixels to read, as for a PHU.
+        psTrace("psModules.camera", 7, "pixel-less HDU: skipping\n");
         *status = true;
         return false;
@@ -470,4 +472,5 @@
     if (z >= naxis3) {
         // Nothing to see here.  Move along.
+        psTrace("psModules.camera", 7, "requested plane off edge of cube: skipping\n");
         *status = true;
         return false;