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Error for VBA function - "Argument Not Optional?"

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    Question Error for VBA function - "Argument Not Optional?"

    I'm getting an error when running my script. The error points to the function below and says "Argument is not optional." I've done similar things before, so I know this should be able to work, but I've played with this code for a couple days now and cannot figure out where the issue is located. I feel like I'm missing something very simple.

    The code:
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    The Call:
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    I've never had to worry about it with these smaller macros, but perhaps I should specify to pass by reference or value?

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    Re: Error for VBA function - "Argument Not Optional?"

    Your Function is looking for a lineid as a LONG number

    You are defining LineID = Dvalue = busbarArray(busbarIterator) So what is that?
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    Re: Error for VBA function - "Argument Not Optional?"

    How is datasheetname being defined?
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    Re: Error for VBA function - "Argument Not Optional?"

    All your function does is return the lineID if it's found; I'd have thought it would return the line number. Either way, the code is looking on the active worksheet, not in dataSheetName.

    I would code it like this to return the row number:

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    Or this to just return True if the value is found:

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