Erlang: tv:start(). - no window pops up - solution

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> I tried tv:start/0 and toolbar:start/0: nothing happend:
>  1) tv:start just returned a PID... nothing more
>  2) toolbar:start was silent for some time and than returned:
>        ** exception exit: {startup_timeout,toolbar}
>             in function  toolbar:init_ok/1

It turns out (tcl/)tk wasn't installed on those systems in question.
After "sudo apt-get -y install tk-dev" tv and toolbar are working! - boris