[GAP Forum] Ascending Chains function

[ekpen ogiugo]

Dear forum,
 Is there anyone that help to solve this error problem on the above-
subject matter:
gap>G:= SymmetricGroup(3);
gap> H:= AllSubgroups(G);
gap> a:= H[1];
gap> b:= H[2];
gap> c:= H[3];
gap> d:= H[4];
gap> e:= H[5];
gap> f:= H[6];
gap> j:= AscendingChains(G,a);
gap> Error

Thanks