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3.5 Monster attack roll math

I keep getting (15)++2+2 ect and it keeps saying AC 0. that a script error?  how do I fix it.
There is an extra +?
1763673578
Gauss
Forum Champion
Hi Fransz M.,  There is probably a blank field somewhere that is making an error.  Please supply screenshot(s) of the character sheet, with all the calculations for AC shown. 
i will invite you to the game and GM you,,,  the character sheet in question is the Bugbear
1763679948

Edited 1763680068
Gauss
Forum Champion
For your game's security please do not publish Join links, private message them. Please delete your previous post. :) I am in your game, please promote me to GM.
1763691169

Edited 1763691409
Gauss
Forum Champion
The Base Attack field is missing a value. Please put something in and it will work correctly. In the screenshot you can see how [BAB] (in the Chat tab) has no value in front of it. Putting a value in the red box will solve the problem.