Index: trunk/psModules/src/concepts/pmConceptsRead.c
===================================================================
--- trunk/psModules/src/concepts/pmConceptsRead.c	(revision 7604)
+++ trunk/psModules/src/concepts/pmConceptsRead.c	(revision 7922)
@@ -181,5 +181,5 @@
     pmHDU *hdu = pmHDUGetLowest(fpa, chip, cell); // The HDU at the lowest level
     if (!hdu) {
-        psError(PS_ERR_UNKNOWN, true, "Can't find HDU for cell");
+        psError(PS_ERR_UNKNOWN, true, "Can't find HDU for fpa, chip or cell");
         return false;
     }