[GAP Forum] AtlasSubgroup

[Marek Mitros]

Hello again,

I would like to thank you to Thomas Breuer who help me out to solve
the problem. The reason was Winzip who when unzipping the MeatAxe
program files to atlasrep/dataword folder added chr(13) before chr(10)
(\r before \n) in each line of the file. It caused that GAP has not
understood the MeatAxe format. When I unzipped using RAR then it is OK
now. I have unzipped the file
http://www.math.rwth-aachen.de/~Thomas.Breuer/atlasrep/atlasrepdata.tar.gz
with all atlas files from datagens and dataword subfolders.

Regards,
Marek

On 10/9/12, Marek Mitros <marek at mitros.org> wrote:
> Dear Forum,
>
> On my work PC functions "AtlasSubgropup" and "AtlasProgram" does not
> work. However I have proper files copied to the folders
> C:\gap4r4\pkg\atlasrep\dataword\
> C:\gap4r5\pkg\atlasrep\dataword\
>
> I have two installations of GAP - 4.4 and 4.5. On both it is the same.
> Here is result of example script on GAP 4.4:
>
> gap> LoadPackage("atlasrep");
> --------------------------------------------------------------------
> Loading  AtlasRep 1.5.0 (An Atlas of Group Representations)
> by Robert A. Wilson (http://www.maths.qmw.ac.uk/~raw),
>    Richard A. Parker (richpark at gmx.co.uk),
>    Simon Nickerson (http://web.mat.bham.ac.uk/S.Nickerson),
>    John N. Bray (http://www.maths.qmw.ac.uk/~jnb), and
>    Thomas Breuer (http://www.math.rwth-aachen.de/~Thomas.Breuer).
> --------------------------------------------------------------------
> true
> gap> g:=AtlasGroup("HN");
> <permutation group of size 273030912000000 with 2 generators>
> gap> sub:=AtlasSubgroup("HN", 3);
> fail
> gap> AtlasProgram("HN", "maxes", 3);
> fail
> gap> AtlasOfGroupRepresentationsInfo.remote;
> true
> gap> AtlasOfGroupRepresentationsInfo.remote:=false;
> false
> gap> sub:=AtlasSubgroup("HN", 3);
> fail
>
> and on GAP 4.5
>
> gap> LoadPackage("atlasrep");
> true
> gap> g:=AtlasGroup("HN");
> <permutation group of size 273030912000000 with 2 generators>
> gap> sub:=AtlasSubgroup("HN", 3);
> fail
> gap> AtlasProgram("HN", "maxes", 3);
> fail
> gap> AtlasOfGroupRepresentationsInfo.remote;
> true
> gap> AtlasOfGroupRepresentationsInfo.remote:=false;
> false
> gap> sub:=AtlasSubgroup("HN", 3);
> fail
>
> Note that I have file C:\gap4r5\pkg\atlasrep\dataword\HNG1-max3W1 on
> disk and C:\gap4r4\pkg\atlasrep\dataword\HNG1-max3W1 as well. So
> AtlasSubgroup should take this file. How can I verify why GAP does not
> see program files on <dataword> folder ?
>
> On my home PC it is working correctly, but the remote access to Atlas
> web page works OK and downloads proper file if needed. On work PC the
> remote access is not working due to some firewall settings I suppose.
> So I would like GAP to access local files.
>
> Regards,
> Marek
>