Dear GAP-Forum,

Charles Wright kindly pointed out two problems with the code for subdirect
products I posted earlier today:
If you have (auto)loaded the `autpgrp' package the function will not run
(but complain about a missing method for
`InnerAutomorphismsAutomorphismGroup'.) You'll have to start GAP without
this package (or create inner automorphisms yourself) to use the function.

More severe is a copying mistake. The line
ys:=Filtered(ys,i->HasTrivialFactorCentralizer(G,x,i));

must be:

ys:=Filtered(ys,i->HasTrivialFactorCentralizer(H,x,i));

Apologies for the problems!

Alexander Hulpke

-- Colorado State University, Department of Mathematics,
Weber Building, Fort Collins, CO 80523, USA
email: hulpke@math.colostate.edu, Phone: ++1-970-4914288
http://www.math.colostate.edu/~hulpke