Bill:

Thanks much for your reply.

It's pretty much as I expected. The only way to refer to a file being
via filename is a fact I hadn't considered, in those terms.

The macro is a good idea. I also had this nifty thought: Whenever I
rename or move a file, I can do it from within the worksheet. I
suppose it could be done with a macro: While on the cell containing a
filename, I can have the macro launch a file dialog, on exit from
which it'd update the filename in the cell.

Thanks again.

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