If an array control reference is passed to a sub-vi, how do I obtain the current length of the array within the sub-vi? I've tried two properties: "NumRows", which as documented, contains the visible number of rows in the array control. "IndexVals" contain the indices of the array element in the upper left corner of the array control. There seem to be no methods for obtaining the current array length. I tried changing the class of the array reference to cluster then using the "Controls[]" property... but this generated a runtime error. What am I missing? Thanks.

If the reference will always be to 1-D array (or perhaps as long as the number of dimensions is always the same), there's an easy way to do this. You can use "Variant to Data" to convert a Variant (that contains an array) to an Array of Variants, and then use Array Size:

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Given array control reference, how do I obtain array size programatically

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Gentlemen. Thanks much for you eager and competent help. All the best.

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Given array control reference, how do I obtain array size programatically

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