atlc is primarily a UNIX program. Some Microsoft Windows binaries have been produced in the past, one of which was atlc-4.4.4_Win32.zip. However, some problems were found in atlc with multiple dielectrics. As such I've removed the windows binaries. If someone wants to build some, based on the latest code I'll put them up again, but whilst the code is not working optimally with multi-dielectrics, it is not seriously broken as it was before. The best solution for Windows uses is to use Cygin, which gives you a Linux environment on a Windows computer. ATLC should build fine on that, though I have never tried it. Dr. David Kirkby, G8WRB, 27th March 2011 Re: atlc-4.6.1