The problem could be as simple as unclosed parentheses. I an unclosed
parenthesis.

On Tue, Jun 4, 2019, 2:27 AM Ralf Hemmecke <[email protected]> wrote:

> Hallo Peter,
>
> [email protected] is the Mailing list for AXIOM, not FriCAS.
> FriCAS is a different project (a fork of AXIOM) with mailing list
> <[email protected]> .
>
> On 6/4/19 10:51 AM, Peter van Summeren wrote:
> > Hello,
> > I installed Fricas on Debian from source.
> > Fricas works fine in a terminal window
> > But if I do:
> > draw( sin ( tan (  x ) - tan ( sin ( x ) ) , x = 0..6)
> >
> > I get "Graph data being transmitted to the viewport manager..." and it
> > hangs!
> >
> > What can I do? No idea what a viewport manager is. Where to get it?
> > With friendly greetings,
> > Peter
>
> Probably what I say here applies to both Axiom and FriCAS.
>
> If you start FriCAS via the 'fricas' script, then (depending on how you
> have compiled FriCAS and what resources are available) it will spawn a
> few processes, among them is HyperDoc, a viewport manager, and the
> actual FriCAS process (still called AXIOMsys). All this is managed by a
> super process (called s(uper)man). In your case, the AXIOMsys process
> computes the graphics and wants to transmit it to the viewport manager
> (an engine that displays the data and lets you interactively work with it).
>
> I suspect, that something went wrong with your compilation (graphics has
> been turned off for some reason by the ./configure run. Without looking
> at the log files, I cannot say. Please send your config.log to
> fricas-devel. Anything that you think might be helpful to solve your
> problem is welcome.
>
> Ralf
>
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