Index: trunk/pswarp/src/pswarpTransformReadout.c
===================================================================
--- trunk/pswarp/src/pswarpTransformReadout.c	(revision 20307)
+++ trunk/pswarp/src/pswarpTransformReadout.c	(revision 20312)
@@ -15,4 +15,5 @@
     psImageInterpolateMode interpolationMode = psMetadataLookupS32(NULL, config->arguments,
                                                                    "INTERPOLATION.MODE"); // Mode for interp
+    int numKernels = psMetadataLookupS32(NULL, config->arguments, "INTERPOLATION.NUM"); // Number of kernels
 
     // load the recipe
@@ -66,5 +67,6 @@
     psImageInterpolation *interp = psImageInterpolationAlloc(interpolationMode, input->image,
                                                              input->weight, input->mask, maskIn,
-                                                             NAN, NAN, maskBad, maskPoor, poorFrac, 0);
+                                                             NAN, NAN, maskBad, maskPoor, poorFrac,
+                                                             numKernels);
 
     if (input->weight && !output->weight) {