I'm getting:

Error 037: Invalid plot value "Obj" SPY at #4096

When training my script with two or more parameters (2+ optimize() calls), I get the above error, then Zorro crashes. It works fine with 1 parameter. I think the error is happening when Zorro is trying to generate the optimization charts. I tried commenting out all plot() calls in my script. It looks like it's generating the .par files fine.

Still, find and fix that error. Commenting out plot calls will avoid the error message, but the bug is still there.

https://manual.zorro-project.com/trouble.htm