Index: trunk/psModules/src/objects/pmPSFtryModel.c
===================================================================
--- trunk/psModules/src/objects/pmPSFtryModel.c	(revision 34403)
+++ trunk/psModules/src/objects/pmPSFtryModel.c	(revision 36123)
@@ -236,4 +236,14 @@
     // linear clipped fit of chisq trend vs flux
     if (options->chiFluxTrend) {
+
+	if (0) {
+	    FILE *f = fopen ("test.psf.dat", "w");
+	    int fd = fileno (f);
+	    p_psVectorPrint (fd, flux, "flux");
+	    p_psVectorPrint (fd, chisq, "chisq");
+	    p_psVectorPrint (fd, mask, "mask");
+	    fclose (f);
+	}
+
         bool result = psVectorClipFitPolynomial1D(psfTry->psf->ChiTrend, options->stats,
                                                   mask, 0xff, chisq, NULL, flux);