Index: trunk/pswarp/src/pswarpTransformReadout_Opt.c
===================================================================
--- trunk/pswarp/src/pswarpTransformReadout_Opt.c	(revision 18188)
+++ trunk/pswarp/src/pswarpTransformReadout_Opt.c	(revision 18558)
@@ -17,7 +17,17 @@
     psImageInterpolateMode interpolationMode = psMetadataLookupS32(NULL, config->arguments,
                                                                    "INTERPOLATION.MODE");
-    psMaskType maskIn = psMetadataLookupU8(NULL, config->arguments, "MASK.IN"); // Mask for input data
-    psMaskType maskPoor = psMetadataLookupU8(NULL, config->arguments, "MASK.POOR"); // Mask for "poor" data
-    psMaskType maskBad = psMetadataLookupU8(NULL, config->arguments, "MASK.BAD"); // Mask for bad data
+    // load the recipe
+    psMetadata *recipe = psMetadataLookupPtr (NULL, config->recipes, PSWARP_RECIPE);
+    if (!recipe) {
+        psError(PSPHOT_ERR_CONFIG, false, "missing recipe %s", PSWARP_RECIPE);
+        return false;
+    }
+
+    // output mask bits
+    psMaskType maskIn   = psMetadataLookupU8(&mdok, recipe, "MASK.INPUT"); 
+    psMaskType maskPoor = pmConfigMaskGet("POOR.WARP", config); 
+    psMaskType maskBad  = pmConfigMaskGet("BAD.WARP", config); 
+    psAssert (mdok, "MASK.INPUT was not defined");
+
     float poorFrac = psMetadataLookupF32(NULL, config->arguments, "POOR.FRAC"); // Flux fraction for "poor"
 
@@ -62,5 +72,5 @@
 
     // Interpolation options
-    psImageInterpolateOptions *interp = psImageInterpolateOptionsAlloc(interpolationMode, inImage,
+    psImageInterpolateOptions *interp = psImageInterpolateOptionsAlloc(interpolationMode, inImage, 
                                                                        inVar, inMask, maskIn, NAN, NAN,
                                                                        maskBad, maskPoor, poorFrac);