Index: trunk/ppSub/src/ppSubCamera.c
===================================================================
--- trunk/ppSub/src/ppSubCamera.c	(revision 13528)
+++ trunk/ppSub/src/ppSubCamera.c	(revision 13665)
@@ -28,6 +28,6 @@
     pmFPAfile *inputMask = pmFPAfileBindFromArgs(&status, input, config, "PPSUB.INPUT.MASK", "INPUT.MASK");
     if (!status) {
-	psError (PS_ERR_UNKNOWN, false, "failed to load find definition");
-	return NULL;
+        psError (PS_ERR_UNKNOWN, false, "failed to load find definition");
+        return NULL;
     }
     if (inputMask && inputMask->type != PM_FPA_FILE_MASK) {
@@ -39,6 +39,6 @@
     pmFPAfile *inputWeight = pmFPAfileBindFromArgs(&status, input, config, "PPSUB.INPUT.WEIGHT", "INPUT.WEIGHT");
     if (!status) {
-	psError (PS_ERR_UNKNOWN, false, "failed to load find definition");
-	return NULL;
+        psError (PS_ERR_UNKNOWN, false, "failed to load find definition");
+        return NULL;
     }
     if (inputWeight && inputWeight->type != PM_FPA_FILE_WEIGHT) {
@@ -62,6 +62,6 @@
     pmFPAfile *refMask = pmFPAfileBindFromArgs(&status, input, config, "PPSUB.REF.MASK", "REF.MASK");
     if (!status) {
-	psError (PS_ERR_UNKNOWN, false, "failed to load find definition");
-	return NULL;
+        psError (PS_ERR_UNKNOWN, false, "failed to load find definition");
+        return NULL;
     }
     if (refMask && refMask->type != PM_FPA_FILE_MASK) {
@@ -73,6 +73,6 @@
     pmFPAfile *refWeight = pmFPAfileBindFromArgs(&status, input, config, "PPSUB.REF.WEIGHT", "REF.WEIGHT");
     if (!status) {
-	psError (PS_ERR_UNKNOWN, false, "failed to load find definition");
-	return NULL;
+        psError (PS_ERR_UNKNOWN, false, "failed to load find definition");
+        return NULL;
     }
     if (refWeight && refWeight->type != PM_FPA_FILE_WEIGHT) {
@@ -115,17 +115,19 @@
 
     // psPhot input
-    pmFPAfile *psphot = pmFPAfileDefineFromFPA(config, output->fpa, 1, 1, "PSPHOT.INPUT");
-    if (!psphot) {
-        psError(PS_ERR_IO, false, "Failed to build FPA from PSPHOT.INPUT");
-        return false;
-    }
-    if (input->type != PM_FPA_FILE_IMAGE) {
-        psError(PS_ERR_IO, true, "PSPHOT.INPUT is not of type IMAGE");
-        return false;
-    }
+    if (psMetadataLookup(config->arguments, "PSPHOT.PSF")) {
+        pmFPAfile *psphot = pmFPAfileDefineFromFPA(config, output->fpa, 1, 1, "PSPHOT.INPUT");
+        if (!psphot) {
+            psError(PS_ERR_IO, false, "Failed to build FPA from PSPHOT.INPUT");
+            return false;
+        }
+        if (input->type != PM_FPA_FILE_IMAGE) {
+            psError(PS_ERR_IO, true, "PSPHOT.INPUT is not of type IMAGE");
+            return false;
+        }
 
-    if (!psphotDefineFiles(config, psphot)) {
-        psError(PS_ERR_UNKNOWN, false, "Unable to set up psphot files.");
-        return false;
+        if (!psphotDefineFiles(config, psphot)) {
+            psError(PS_ERR_UNKNOWN, false, "Unable to set up psphot files.");
+            return false;
+        }
     }