Compiler error C0120

Message: An 'FB_Exit'-Method of a functionblock or struct needs an input 'bInCopyCode' of type BOOL.

Possible error cause: The input 'bInCopyCode' of type BOOL is missing.

Error correction: Define the input.

Example of the error:

PROGRAM PLC_PRG
VAR
    inst : FB;
END_VAR


FUNCTION_BLOCK FB	
METHOD FB_exit
VAR_INPUT
END_VAR


--> C0120: An 'FB_Exit'-Method of a functionblock or struct needs an input 'bInCopyCode' of type BOOL.

Error correction:

Example:
METHOD FB_exit 
VAR_INPUT
    bInCopyCode : BOOL;
END_VAR