Index: /trunk/psvideophot/src/psvideoLoop.c
===================================================================
--- /trunk/psvideophot/src/psvideoLoop.c	(revision 32786)
+++ /trunk/psvideophot/src/psvideoLoop.c	(revision 32787)
@@ -234,5 +234,7 @@
                     Centering(readout->image, EDGE, &vpSum, xy, median);
 
-                    vpFlux = SubSum(readout->image, xy, median);
+                    if (isfinite(xy[0]) && isfinite(xy[1])) {
+                        vpFlux = SubSum(readout->image, xy, median);
+                    }
 
 //                    printf("%4d %9.2f %9.2f %9.2f %.1f %.1f %9.2f\n",