Testing xCAS version 1.2.3-9 (2017)

[DrD]

I can't be sure that there wasn't something in the CAS variables x or y. (I don't think there was). Also, I don't think x or y (lower case vars) are legal in the apps. I had to reset the emulator yesterday, due to other unrelated issues, which kind of helps confirm that vars x and y were symbolic.

Since it was the var y being solved for in the troublesome statement, maybe that one was the issue. It's working now, so I may never find out definitively.