Hello  Villani,

> Thanks for the prompt answer. I did what you wrote, but I still get the same error.
>
> I am trying to install ET on a Ubuntu 16.04 machine, could it be a problem?
Ubuntu 16.04 should be find as we use that version as the base of our
tutorial server.

Have you tried the

!rm -r ~/Cactus/configs/sim

line as well? It may be that after the first failed attempt, the build
is now in a strange state.

Would you mind if I fowarded these emails to the mailing list as well
so that others now when / if the issue has been resolved?

Yours,
Roland

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