One more thing...

[ajf]

Following on from my earlier email...

This may be unsurprising, but I also notice that when my program aborts
and returns me to hugs, re-running the program with a smaller problem
size (one that USED to work OK) sometimes also aborts.  Just now the
same thing happened for ALL problem sizes - right down to drwaing just
half a dozen lines.  When I quite Hugs and then re-start it problems the
'problem' seems to go away.  In other words, I'm seeing
non-deterministic behaviour!

Tony Field.
Imperial College