>
> Hi
>
> it seems that I have no luck at the moment.
>
> Now the post tangle hook does not seem to be called.
>

It is called, however the shell script you are trying to execute is not
executing because it is not set as executable.  The permissions of
tangled files are set *after* the post-tangle hook is called (so that
the post-tangle hook has a chance to modify files which will eventually
be set to read only).

You example is trying to run a tangled shell script before it is set to
be executable.  This can not work.  My attached alternative of your
example does run the shell script by not assuming it is executable.