how do i fix this???? error unknown identifier

[R4nge M4ster22]

Failed when compiling
Line 229: [Error] (14979:27): Unknown identifier 'CharsFileString' in script C:\Program Files\SCAR 2.03\Scripts\Icefire908sAirCrafterV3.1.scar

i keep getting stuff like this whenever trying to run any script
i have download all includes
i have scar 2.03
and i have slr v370

can someone tell me how to fix this!?!?!?!?!

[Fearlesssss]

I don't know sorry. But maybe it's a good idea to read the setup of the AirCrafter and check if you did everything right;)