One simple gcode expression question.

I can hardly believe that I'm even asking this, but....why does the following gcode not print a message consisting of '2' :

(MSG, [1+1])
M30

I have tried every permutation of MSG, DEBUG, brackets, parentheses, #, and god-only-knows what else that I can think of, and all I seem to be able to get is the message [1+1]. Basically I cannot get expressions to be evaluated, and it's making me bonkers.

The real pisser is that this is not even close to the actual mystery that I am trying to solve! If someone could point out the painfully obvious I would really appreciate it.

tnx,
Patrick

If you calculate outside of (debug, ) , as
it will success

I tried it, and you're right. Thanks. But I wonder why on Earth would debug NOT evaluate expressions?

I guess that's why I couldn't figure it out...it doesn't say anywhere in the gcode reference that expressions are only evaluated OUTSIDE of things like debug, msg etc. which is not what I think anyone would expect.

Patrick

ps1 - I think you meant to say 'it will succeed'.
ps2 - I'm still wrestling with the G38 stuff, although I'm close. I may have another question about that later!!!

Oh, and it doesn't work either way with msg, only with debug. Just to make things even more interesting...!

Patrick