Heyo. When I try to gmake CERL's contributed ISM, I am getting the error message: main.c: 7 Can't find include file gl.h There are 2 Sun systems here and neither one seems to have gl.h. Does anyone have an idea what gl.h is and/or why we don't have it? Should it be very "standard"? Thanks for any info. -nancy ngreeley at hanover-crrel.army.mil