your include file (ti83plus.inc) likely defines bjump as a macro rather than an instruction, meaning that it wants parenthesis around it:
bjump(_JForceCmdNoChar)
I believe the include file defines the instruction as B_JUMP, but i'm not positive, as I perfer the bjump() style syntax
also you can save 2 bytes in your code by using bcall instead of bjump. It will do exactly the same thing, and doesnt matter its suppose to be a jump, since this call will never return anyway