Redirecting Error Output

Im attempting to debug slime for ecl on windows and one of the possibilities that it is failing is that the sending side somehow throws an error which prevents slime from completly reading the stream. So i would like to redirect error outputs on ecl to a text file. I tried (setf *error-output* (open "afile.txt")) but when an error is thrown it throws some internal error and ecl closes. Anyone know how i can do this?

I'm only guessing here, but possibly it's because OPEN opens a file for reading by default and you didn't specify the direction.

Tried opening a bidirectional stream in clozure and it didn't even do anything... besides open a create the file..

Check the *inferior-lisp* Emacs buffer for errors.