When does this happen? When you first start the program? I've not heard of any others having this issue. Any other error messages before this one?
I see it's not a problem with T4, but with my system. The same happens if I install any older version, that used to work fine. So it seems I have broken something, but what could it be? What does T4 rely on? NET Framework, maybe?
Thanks for your interest.
Carlos