Well, after upgrading to Intellicad 8.4, I have once again got the problem of the error message "There was a problem while sending the command to the program". After a bit of internet searching I have discovered how to solve this for Intellicad, which requires a change to the windows regis...

This is a very late reply to the original post by SteveN, but I had exactly the same problem a few months ago. I was able to solve this eventually, as I discovered that there was an entry in my Windows registry (using Win7 64 bit) which referred to an older version of Intellicad (8.1). Even though I...