Index: trunk/ippconfig/recipes/filerules-mef.mdc
===================================================================
--- trunk/ippconfig/recipes/filerules-mef.mdc	(revision 35081)
+++ trunk/ippconfig/recipes/filerules-mef.mdc	(revision 35562)
@@ -118,7 +118,8 @@
 PSWARP.VARIANCE         INPUT    @FILES        CHIP       VARIANCE
 PSWARP.MASK             INPUT    @FILES        CHIP       MASK
-PSWARP.SKYCELL          INPUT    @FILES        CHIP       IMAGE
+PSWARP.SKYCELL          INPUT    @FILES        CHIP       WCS
 PSWARP.ASTROM           INPUT    @FILES        CHIP       CMF
-PSWARP.BKGMODEL		  INPUT	   @FILES	 CHIP	    IMAGE
+# Note: if input astrometry does not have sources, either set the above file type to WCS and/or set pswarp.config:SOURCES to false
+PSWARP.BKGMODEL         INPUT    @FILES	       CHIP	  IMAGE
 
 ## files used by ppsub
@@ -298,5 +299,5 @@
 PSWARP.BIN2             OUTPUT {OUTPUT}.b2.fits                  IMAGE     COMP_IMG   FPA        TRUE      NONE
 PSWARP.CONFIG           OUTPUT {OUTPUT}.pswarp.mdc               TEXT      NONE       FPA        TRUE      NONE
-PSWARP.OUTPUT.BKGMODEL	OUTPUT {OUTPUT}.mdl.fits		      IMAGE	      NONE	 FPA	    TRUE      NONE
+PSWARP.OUTPUT.BKGMODEL	OUTPUT {OUTPUT}.mdl.fits		 IMAGE     NONE       FPA        TRUE      NONE
                                                                                      
 SKYCELL.STATS           OUTPUT {OUTPUT}.stats                    STATS     NONE       FPA        TRUE      NONE