Warning messages

Hello,

I'm using Slime with Lispworks 7.0.0 enterprise on linux x86_64 and
completion seems to be causing those warnings:

Warning: Local Variable Initialization clause (the binding of
SWANK::TPOS) follows iteration forms but will be evaluated before
them.

Is there any way to silent warnings or perhaps redirect them to a file
as opposed to the current emacs window?

Jerome