Thank you for your response. apn found what I was doing wrong. I needed to run vcvars64.bat and then do the nmake in the same command window. Without that I was doing a 32-bit compile using a 64-bit Tcl. I am a happy camper now. Gerry
Thank you for your response. apn found what I was doing wrong. I needed to run vcvars64.bat and then do the nmake in the same command window. Without that I was doing a 32-bit compile using a 64-bit Tcl. I am a happy camper now. Gerry