Index: /trunk/psphot/src/psphotChoosePSF.c
===================================================================
--- /trunk/psphot/src/psphotChoosePSF.c	(revision 14965)
+++ /trunk/psphot/src/psphotChoosePSF.c	(revision 14966)
@@ -212,4 +212,11 @@
     }
 
+    // build a PSF residual image
+    if (!psphotMakeFluxScale (readout->image, recipe, try->psf)) {
+        psError(PSPHOT_ERR_PSF, false, "Unable to construct flux scale for PSF");
+        psFree (models);
+        return NULL;
+    }
+
     // XXX test dump of psf star data and psf-subtracted image
     if (psTraceGetLevel("psphot.psfstars") > 5) {