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    Compiler Error C0240

    Message: First Operand of __QueryPointer must be an interface reference or the instance of a function block

    Possible error cause: Incorrect operands are passed to the operator __QueryPointer.

    Error correction: Pass an interface reference or the instance of a function block.

    Example 463. Example of the error:
    PROGRAM PLC_PRG
VAR
    a : INT;
    ITFref : ITF;
    pt : POINTER TO FB;
END_VAR

__QueryPointer(a,pt);

    Message:

    C0240: First Operand of __QueryPointer must be an interface reference or the instance of a function block

    Error correction:

    __QueryPointer (ITFref, pt);