Index: trunk/ippTools/src/difftool.c
===================================================================
--- trunk/ippTools/src/difftool.c	(revision 20693)
+++ trunk/ippTools/src/difftool.c	(revision 20719)
@@ -557,5 +557,5 @@
     psMetadata *where = psMetadataAlloc();
     PXOPT_COPY_S64(config->args, where,  "-diff_id", "diffSkyfile.diff_id", "==");
-    PXOPT_COPY_STR(config->args, where, "-skycell_id", "diffSkyfile.skycell_id", "==");
+    PXOPT_COPY_STR(config->args, where, "-skycell_id", "diffInputSkyfile.skycell_id", "==");
     PXOPT_COPY_STR(config->args, where, "-tess_id", "diffSkyfile.tess_id", "==");
     PXOPT_COPY_S16(config->args, where, "-code", "diffSkyfile.fault", "==");