I ran the same post and got the same error.
Code:
Processing file with MPCENM4...
Selector variable opcode = 19.0
out of range for string select.
Postblock label pwrtt
It still posted the file, and it seems to be ok. I'm not sure where the error is coming from, as I can't find an opcode with a value around 19. (highest is 3 that I saw looking thru the post real quick)
I'll check into it some more. Mean time, the file did post OK. You might try loading the program in the controller and (carefully) running it to see what happens.