Solved
Is the Excel worksheet up to date? You call Sheet 2 in your Mathcad worksheet, but in addition to the lack of Column D, there is no Sheet 2 in "Total Original Location.xlsx".
I modified your Mathcad worksheet to construct the range from the sheet number, column letter and number of lines; I also modified Sheet 1 to include a Column D (scaled copy of Column C). I didn't see any errors when using Sheet 1 for all valid ranges. I then changed rang_6 to point to the empty Column E and got a vector of zeros (as expected from an empty column).

Stuart
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