[GAP Forum] Problem with GRAPE 4.2 under GAP 4.4.5

[Leonard Soicher]

Dear GAP-Forum,

Due to a slight change in the functionality of
`StabChainBaseStrongGenerators' in GAP 4.4.5, there is a problem
(under Unix) when GRAPE/nauty computes a trivial automorphism group
for a graph (this leads to a break-loop being entered, not incorrect
results being returned). This problem may be fixed by replacing the file
   $GAPROOT/pkg/grape/lib/grape.g  
by the file at
   http://www.maths.qmul.ac.uk/~leonard/grape/grape.g 
Users of the Design 1.1 package under a Unix version of GAP 4.4.5 should
also make this change to GRAPE.

I am grateful to Akihide Hanaki for pointing out this problem.

Regards, Leonard