Index: trunk/ppStack/src/ppStackLoop.c
===================================================================
--- trunk/ppStack/src/ppStackLoop.c	(revision 17266)
+++ trunk/ppStack/src/ppStackLoop.c	(revision 17426)
@@ -215,5 +215,5 @@
     pmReadout *sources = NULL;          // Readout with sources to use for PSF matching
     pmPSF *targetPSF = NULL;            // Target PSF
-    {
+    if (psMetadataLookupBool(NULL, config->arguments, "HAVE.PSF")) {
         pmFPAfileActivate(config->files, false, NULL);
         fileActivation(config, prepareFiles, true);