This error message is displayed for one of two reasons :
- Adobe Acrobat, Adobe Acrobat Reader or another application is holding the PDF file you are trying to protect open. Close down any applications that are holding this file open. If this still does not solve the problem then also close Adobe Acrobat because the file may still be held open in memory.
- You do not have administrative privileges on that computer. You must be logged on as a Windows Administrator to use Safeguard Writer.