Index: /trunk/psModules/src/astrom/pmAstrometryRegions.c
===================================================================
--- /trunk/psModules/src/astrom/pmAstrometryRegions.c	(revision 12710)
+++ /trunk/psModules/src/astrom/pmAstrometryRegions.c	(revision 12711)
@@ -4,6 +4,6 @@
  *
  *  @author EAM, IfA
- *  @version $Revision: 1.2 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2007-03-30 21:12:56 $
+ *  @version $Revision: 1.3 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2007-04-01 03:10:12 $
  *
  *  Copyright 2006 Institute for Astronomy, University of Hawaii
@@ -104,4 +104,5 @@
         pmChip *chip = chips->data[i];  // Chip of interest
         psRegion *chipExtent = pmAstromChipInFP(chip); // Extent of chip
+	if (!chipExtent) { continue; }
         fpaExtent->x0 = PS_MIN(fpaExtent->x0, chipExtent->x0);
         fpaExtent->x1 = PS_MAX(fpaExtent->x1, chipExtent->x1);