Index: trunk/ppSub/src/ppSubMatchPSFs.c
===================================================================
--- trunk/ppSub/src/ppSubMatchPSFs.c	(revision 35240)
+++ trunk/ppSub/src/ppSubMatchPSFs.c	(revision 35924)
@@ -57,5 +57,5 @@
     if (!pmFPACopy(photFile->fpa, ro->parent->parent->parent)) {
         psError(PPSUB_ERR_CONFIG, false, "Unable to copy FPA for photometry");
-        return false;
+        return NAN;
     }
 
@@ -76,5 +76,5 @@
         psWarning("Unable to determine PSF.");
         psFree(view);
-        return true;
+        return NAN;
     }
     psFree(view);