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Re: [tlaplus] Issues with seeing error trace and enabling Deadlock setting
On 15.08.20 17:08, Varun Gandhi wrote:
> Hi folks. To get started, I'm tried running the basic example from
> ---- MODULE example ----
> EXTENDS Naturals, TLC
> (* --algorithm transfer
> variables alice_account = 10, bob_account = 10, money \in 1..20;
> A: alice_account := alice_account - money;
> B: bob_account := bob_account + money;
> C: assert alice_account >= 0;
> end algorithm *)
> Save that to `example.tla`, compile the PlusCal to TLA+, create an empty
> model and run that model. I do see a similar error but I don't see any
> error trace as shown in the screenshot here: https://imgur.com/a/AzCEe0a.
> Is it because of some misconfiguration? Any suggestions for debugging?
> Configuration information: Ubuntu 20.04 LTS, v1.7.0 Aristotle zip from
> https://github.com/tlaplus/tlaplus/releases/, running javac/JDK 14.0.1.
> As an alternative, I did try v1.6.0 Zenobius and that does show the
> error trace OK, so I'm going to use that for now.
> I also noticed that the "Deadlock" box on the Model Overview screen is
> unchecked by default (and clicking it does nothing), unlike the macOS
> screenshot on learntla.com. However, I can add/select/unselect
> Invariants and Properties just fine. This problem seems to be present
> with both v1.6.0 and v1.7.0.
please use a recent nightly build  to get the fix for the missing
As to the Deadlock button, this appears to be an incompatibility with
(some of) the Gnome themes in Ubuntu 20.04. The visual difference
between a button being checked and unchecked is minimal. Unfortunately,
we don't have a workaround or fix yet.
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