If you're a TaxSlayer Pro Premium subscriber and are attempting to add a PDF to a particular client's entry in Paper Cut, you will receive the following error message if the PDF you are adding is also open in the program you use to view PDFs (often Adobe Acrobat Reader):
FileInfo Move Failed.
<IOException> The process cannot access the file
[filename].pdf because it is
being used by another process.
Resolving this error is simple: Close this file's tab in the PDF program, or close the PDF program.