'rt:2' indicates a missing file.
Sorry, I forgot to mention that. Yes this file wasn't created. Instead I got:
myscript.par
myscript_1.par
myscript_2.par
....
As I would expect, because the parameters aren't asset related. I think the next problem would arise if I mix global parameters with asset specific ones...
I tested what happens if I manually rename the files to myscript_USDJPY_1.par. (USDJPY is just an example. The Zorro looks for whatever asset I choose from the dropdown menu)
Error message:
Read myscript_USDJPY_1.par
Error 042: no USD/JPY parameters at walk 0
So the script somehow seems to think, that the parameters are asset specific.