Has anyone been able to get the antennavis program to work with Tcl/Tk8.4? I apparently managed to munge something. when trying to compile the program it complains about TK_Main. I took a stab at fixing that by substituting TK_MainEx in the TKAntenna.c routine, however all I get is: Aborted When I try to run the routine. Any good ideas? Thanks, Dave WB4LHO