Dear GAP Forum,

On Thu, Feb 04, 1999 at 12:42:16PM -0600, Mario Pineda Ruelas wrote:
> Dear gap forum, I am using GAP4B4 and I don't know how to increase the
> workspace memory. I have tried to use the manual and I just get messages
> like the following:
> 
> Group([ (1,2)(3,4), (1,3)(2,4), ( 1, 3, 5, 7, 9,11)( 2, 4, 6, 8,10,12) ])
> gap> Size(g);
> 23040
> gap> l:=LatticeSubgroups(g);
> gap: cannot extend the workspace any more
> gap: A fatal error has occurred. 
> 
> I would appreciate any help with this matter since I want to calculate the
> lattice of certain groups of large orders (e.g., 46 080). Thank you in
> advance for your help.
> 
> Sincerely,
> 
> M. Pineda.
> 
> 

With GAP4, the above successfully worked. However, it needed almost
90M of memory, so I can see a fatal error on a 64M RAM PC with no VM
configured, for example.

With GAP3, I get the following error:
------------------------------------------------------------------------
Error, sorry, can' t identify the group's solvable residuum in
struct.operations.RepresentativesPerfectSubgroups( struct ) called from
RepresentativesPerfectSubgroups( ShallowCopyNoSC( G ) ) called from
struct.operations.LatticeSubgroups( struct ) called from
LatticeSubgroups( g ) called from
------------------------------------------------------------------------

Any ideas why?

Igor