[GAP Forum] Help with alnuth package

nullgraph null nullgraph at gmail.com
Wed Sep 28 06:28:47 BST 2011


Hi everyone,
I'm trying to install the alnuth package with GAP 4. I'm on Windows 7
and I'm using Alexander Hulpke's GAP Installer for Windows. I've done
the following steps:

1. Install GGAP (includes  GAP 4.4.12)
2. Install the alnuth package
3. Install KANT/KASH
4. Change the binding in alnuth\defs.g to reflect the Kash installation

So far, I'm able to run Kash on itself as command line, I'm able to
load package alnuth from the GGap interface. I verified that simple
commands worked in Gap. I tried to run the following example (from the
alnuth manual) and get some results:

m1 := [ [ 1, 0, 0, -7 ],
[ 7, 1, 0, -7 ],
[ 0, 7, 1, -7 ],
[ 0, 0, 7, -6 ] ];;

m2 := [ [ 0, 0, -13, 14 ],
[ -1, 0, -13, 1 ],
[ 13, -1, -13, 1 ],
[ 0, 13, -14, 1 ] ];;

F := FieldByMatricesNC( [m1, m2] );
<rational matrix field of unknown degree>
DegreeOverPrimeField(F);
4

But when I tried to run the following command, I get error:

U := UnitGroup(F);
Error, Creation of the temporary directory KANTOUPUT failed

Also, when I run the alnuth test
ReadPackage( "Alnuth", "tst/testall.g" );
I also get the same error.

I'm not sure what I'm doing wrong at this point. Also, this is my
first time with mailman and a mailing list so please excuse me if I
make an etiquette error.

Thanks a lot!



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