Just noticed another wrinkle with this issue. I thought if I renamed one of the duplicate files I could at least know which one to keep if I have to delete the other one. When renaming the file from Homebase ProSeries will save two copies of it, but ProSeries crashes during the rename process.  I can't see the new duplicate files until I restart ProSeries.  Why is ProSeries saving two copies? It doesn't seem to matter which file I rename--the one with the logical location or the one with the mapped drive letter--they both crash ProSeries.