Index: trunk/ppSub/src/ppSubDefineOutput.c
===================================================================
--- trunk/ppSub/src/ppSubDefineOutput.c	(revision 31156)
+++ trunk/ppSub/src/ppSubDefineOutput.c	(revision 31435)
@@ -44,6 +44,21 @@
 
     // Convolved input images
-    pmReadout *inConv = pmFPAfileThisReadout(config->files, view, "PPSUB.INPUT.CONV"); // Input readout
-    pmReadout *refConv = pmFPAfileThisReadout(config->files, view, "PPSUB.REF.CONV"); // Reference readout
+    psMetadata *recipe = psMetadataLookupPtr(NULL, config->recipes, PPSUB_RECIPE);
+    bool noConvolve = psMetadataLookupBool(NULL, recipe, "NOCONVOLVE"); // Do not use convolved images.
+
+    pmReadout *inConv;
+    if (noConvolve) {
+      inConv = pmFPAfileThisReadout(config->files, view, "PPSUB.INPUT"); // Input readout
+    }
+    else {
+      inConv = pmFPAfileThisReadout(config->files, view, "PPSUB.INPUT.CONV"); // Input readout
+    }
+    pmReadout *refConv;
+    if (noConvolve) {
+      refConv = pmFPAfileThisReadout(config->files, view, "PPSUB.REF"); // Reference readout
+    }
+    else {
+      refConv = pmFPAfileThisReadout(config->files, view, "PPSUB.REF.CONV"); // Reference readout
+    }
     psFree(view);
 
@@ -60,5 +75,5 @@
         kernels = psMetadataLookupPtr(&mdok, analysis, PM_SUBTRACTION_ANALYSIS_KERNEL);
     }
-    if (!kernels) {
+    if (!kernels && !noConvolve) {
         psError(PPSUB_ERR_UNKNOWN, true, "Unable to find SUBTRACTION.KERNEL");
         psFree(outRO);
@@ -66,5 +81,7 @@
     }
     psAssert (hdu, "unable to find HDU");
-    psMetadataAddStr(outHDU->header, PS_LIST_TAIL, "PPSUB.KERNEL", 0, "Subtraction kernel", kernels->description);
+    if (!noConvolve) {
+      psMetadataAddStr(outHDU->header, PS_LIST_TAIL, "PPSUB.KERNEL", 0, "Subtraction kernel", kernels->description);
+    }
     outHDU->header = psMetadataCopy(outHDU->header, hdu->header);