Larry, One note on the 5.6.A distribution is that I have your patched sfmap.f routine in the source tarfile distribution as: $GEMPAK/source/programs/sf/sfmap/sfmap.f.uwyo. This distribution still uses the previous version, so you might want to copy the file to match your changes. I have forwarded your changes to NCEP and will work with them to clean up the problem you were seeing. Steve Chiswell Unidata User SUpport