This is with 3.2 running on a Sun Sparcstation 1+ with the distributed
binary obtained from wuarchive.wustl.edu. Looks like it is asking for
the length of a non-existant list. Other than that, I have no idea
what the trouble is.

I'd appreciate a workaround.

gap> g:=ThreeGroup(243,4);;
gap> h:=ThreeGroup(243,5);;
gap> gt:=CharTablePGroup(g);;
gap> ht:=CharTablePGroup(h);;
gap> x:=TransformingPermutationsCharTables(gt,ht);
Error, List Element: <list>[6] must have a value at
return Length( fam1.permutations[x] )
<> Length( fam1.permutations[bij_rows[x]] ) ... in
func( l ) called from
ForAny( [ 1 .. Length( bij_rows ) ], function ( x ) ... end ) called from
TransformingPermutations( tbl1.irreducibles, tbl2.irreducibles ) called from
TransformingPermutationsCharTables( gt, ht ) called from
main loop
brk>