[tex-live] [OT] Urgent help needed

[Karl Berry]

Hi Norbert,

    Does on of you have an idea?

Yes.  You have:

\gdef\egroup{{#2}}%

Do not redefine \egroup :).  That's defined in plain.tex as an implicit
begingroup character.

    One more question: How can I trace opened groups/closed groups, because

I tried \tracingall\tracingonline=0 and running with elatex, which gives
the maximum tracing I know of, but even that does not really describe
the group nesting, as far as I can see.  Too bad.

Happy conferencing,
k