Hi @Stefan Schippers I am actually trying to install Xschem in Windows. I have found a setup file. When I try to install that it says ActiveTd v8.6 must be installed and then the setup wizard ends. What is actually ActiveTd v8.6? I have searched in google but did not find anything!

You're looking for ActiveTcl8.6: https://docs.activestate.com/activetcl/8.6/

For windows installation please go through these documents: http://cgi.repo.hu/cgi-bin/minisvn.cgi?cmd=cat&repo=xschem&path=trunk/XSchemWin/INSTALL_WIN http://cgi.repo.hu/cgi-bin/minisvn.cgi?cmd=cat&repo=xschem&path=trunk/XSchemWin/README_WIN