Hi, I compiled ns 2.1b3 on Solaris 2.5.1 using gcc 2.8.1 successfully. However, when executed, it causes segementation fault when it tries to bind a Tcl variable to a Traced variable. The same programme runs perfectly on Linux 2.0.30 and DEC OSF/1. Any pointer would be very much appreciated. Thanks. regards, KJ, Loh