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GEMPAK users, I have an update for displaying the compressed (zlib) NIDS images. I have found that some compilers are more picky about a type comparison I used in a test for whether a product met all the criteria for a zlib block. In $GEMPAK/source/gemlib/im/imnexz.c, line 60: char *boff; should be unsigned char *boff; If you built on your system, you can just make that change, then update your executables with: cd $GEMPAK/source/gemlib/im make clean make all make clean cd $NAWIPS make clean make all make install make clean If you downloaded the binary distribution, you can re-download the tarfile and just extract the bin/(sol, x86, linux) directory with: gunzip -c gempak_upc5.6.a_xxx.tar.gz | tar xvf - bin Steve Chiswell