ListView - Invalid Property Value

I'm new at using ListView. The following returns an Invalid Property Value message

Code:

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      .Item(1).SubItems(ColumnCounter + 1) = NewData(ColumnCounter)

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What am I doing wrong?

Either NewValue doesn't return a string or something, that can to transformed to a string, like a number.

Or the columncounter variable contains a number, that is too high. The first subitem of a given item has index 1.

Hope this helps

Thanks AIS_DK - it was a problem with the columncounter being too high.