On 2 Oct 2012, Uwe Brauer told this:
> thanks,  that worked in the sense that matlab starts.
> However when I start Matlab I receive
> ERROR: ld.so: object '/opt/trinity/lib/kgtk/libkgtk2.so' from LD_PRELOAD cannot be preloaded: ignored.

This ERROR is harmless: it probably means that
/opt/trinity/lib/kgtk/libkgtk2.so is 64-bit and matlab is 32-bit, though
a number of other more unlikely possibilities exist.

(Well, it's harmless except that Matlab won't use the qt-kgtk themes.)

> and worse I cannot use the tcsh shell.
> Everytime I use the shell this message appears and then env not defined and my settings in .login and
> .tcshrc are ignored.

I think you'll find that these two things are unrelated. The error
message has no effect on anything else other than that the library in
LD_PRELOAD / /etc/ld.so.preload is not loaded. None. I suspect a bug in
your .login or .tcshrc. (I'd offer debugging suggestions, but it's been
fifteen years since I last used a csh derivative in anger, and I can't
remember the tcsh equivalent of set -x...)

-- 
NULL && (void)