Compiler error C0097

Message: Duplicate definition of variable '<variable name>' in function block '<function block name>' and in base '<base function block name>'

Possible error cause: A variable is declared with the same name in a function block and its base.

Error correction: Use different variable names.

Example of the error:

PROGRAM PLC_PRG 
VAR
	fb : FB;
END_VAR


FUNCTION_BLOCK FB EXTENDS FB2
VAR
	i : INT;
END_VAR


FUNCTION_BLOCK FB2
VAR
	i : INT;
END_VAR


--> C00097: Duplicate definition of variable 'i' in function block 'FB' and in base 'FB2'