Well, TLC doesn't accept specifications that cannot be parsed. Do you get a syntax error in the main (specification) view of the Toolbox? If the Toolbox is in a weird state, you may have to reset it. Have a look at the section called "In Case of Trouble" of the Help pages.
Hope this helps,
> On 22 Jan 2019, at 07:50, yati....@gmail.com
> It's a simple PlusCal algorithm spec + model, and I was able to run it until the last time I restarted the toolbox. I tried changing something in the algorithm specification and retranslating, but that didn't help either. I've attached a screenshot of the error dialog. Any pointers?
> : https://pasteboard.co/HXAo1JH.png
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