Yes; I tried running it with and without the renaming. If I run it from Word with the renaming, then nothing happens after you select "Edit Individual Documents" - it just appears to do nothing.

If I keep the original name (as per your original code) and run the macro on the mailmerged document, I get the runtime error.

For this whole exercise, I am using an Excel spreadsheet as the source, and mailmerging a Word document (using the spreadsheet to populate fields in a letter).

I hope that makes sense.