Dear Gordon,

the lattice computation should work once you have installed bugfixes
7 and 8, avaliable from

http://www-gap.dcs.st-and.ac.uk/~gap/Info4/bugfixes.html

(From the GAP log you sent us, it seems that you have installed fixes
1-6). The reason why Kurt Ewald couldn't reproduce the problem is
that the bug was introduced in one of the fixes 4 to 6, and his
version of GAP is older.

Btw.: It might be a good idea to send bug reports to gap-trouble,
instead of the GAP forum, because (unless the bug produces wrong
results) are usually not of general interest.

Regards,

Burkhard Hofling.

-- 
__________________________________________________________________
Dr. Burkhard Höfling                         phone: (03641) 946165
Mathematisches Institut                 internatl. +49 3641 946165
Friedrich Schiller University                Fax   +49 3651 946162
D-07740 Jena, Germany              www.minet.uni-jena.de/~hoefling