I've now stopped it after another week:
// ** Interrupt at cmd:`finduni` in line:' ideal F=finduni(I);//F[i] generates I intersected with K[var(i)]'
abort command(a), continue(c) or quit Singular(q) ?q
halt 2
sage: quit
Note I'm running 3.1.1 in from Sage. Input file is
http://www.ma.hw.ac.uk/~chris/k_34_sing.txtand output (before the stop above) at
http://www.ma.hw.ac.uk/~chris/sing_34_op.txtmany thanks,
Chris