Dear Markus,
For me, this works fine, both with default packages and without packages,
for example:
GAP4, Version: 4.4.12 of 17-Dec-2008, i686-apple-darwin10.8.0-gcc
Components: small 2.1, small2 2.0, small3 2.0, small4 1.0, small5 1.0,
small6 1.0, small7 1.0, small8 1.0, small9 1.0, small10 0.2,
small11 0.1, id2 3.0, id3 2.1, id4 1.0, id5 1.0, id6 1.0, id9 1.0,
id10 0.1, trans 1.0, prim 2.1 loaded.
Packages: AClib 1.1, Polycyclic 2.8.1, Alnuth 2.3.1, AutPGrp 1.4, nq 2.2,
GAPDoc 1.3, IO 3.3, CrystCat 1.1.3, Cryst 4.1.6, CRISP 1.3.4,
CTblLib 1.1.3, TomLib 1.1.4, FactInt 1.5.3, FGA 1.1.0.1,
IRREDSOL 1.2, LAGUNA 3.5.0, Sophus 1.23, MIPLib 1.0,
Polenta 1.2.7, ResClasses 3.0.0 loaded.
gap> AutomorphismGroup(DihedralGroup(8));
<group of size 8 with 3 generators>
Which version of GAP are you using? How did you install it?
Could you copy-and-paste the exact GAP session where you have this error?
Best wishes,
Alexander
On 25 May 2012, at 10:05, Markus Szymik wrote:
>
> Dear Forum,
>
> I am trying to compute automorphism groups of p-groups,
> and GAP responds with an error message I don't understand.
> For example,
>
> AutomorphismGroup(DihedralGroup(8));
>
> results in:
>
> ...
> RuntimeError: Gap produced error output
> Function: number of arguments must be 1 (not 2)
>
> The command works fine for all groups of order less than 8.
> What is wrong here?
>
> Thanks,
>
> Markus
>
>
>
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Dr. Alexander Konovalov School of Computer Science
& Centre for Interdisciplinary Research in Computational Algebra
University of St Andrews Tel +44/0 (1334) 461633
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