Index: branches/pap/psphot/src/psphotApResid.c
===================================================================
--- branches/pap/psphot/src/psphotApResid.c	(revision 28498)
+++ branches/pap/psphot/src/psphotApResid.c	(revision 28534)
@@ -328,5 +328,5 @@
     psMetadataAdd (readout->analysis, PS_LIST_TAIL, "DAPMIFIT", PS_DATA_F32 | PS_META_REPLACE, "ap residual scatter", psf->dApResid);
     psMetadataAdd (readout->analysis, PS_LIST_TAIL, "NAPMIFIT", PS_DATA_S32 | PS_META_REPLACE, "number of apresid stars", psf->nApResid);
-    psMetadataAdd (readout->analysis, PS_LIST_TAIL, "APLOSS",   PS_DATA_F32 | PS_META_REPLACE, "aperture loss (mag)", psf->growth->apLoss);
+    psMetadataAdd (readout->analysis, PS_LIST_TAIL, "APLOSS",   PS_DATA_F32 | PS_META_REPLACE, "aperture loss (mag)", psf->growth ? psf->growth->apLoss : NAN);
 
     psLogMsg ("psphot.apresid", PS_LOG_DETAIL, "aperture residual: %f +/- %f\n", psf->ApResid, psf->dApResid);