One or more files in the SYSVOL could not replicate.
For more in-depth monitoring of SYSVOL and FRS, download and install the Ultrasound tool from the Microsoft Web site at http://go.microsoft.com/fwlink/?LinkId=25827. Ultrasound shows health ratings and historical information about FRS replica sets. You can use it to monitor the progress of replication and to detect problems that can cause replication to become backlogged or stop. Ultrasound also provides detailed views for troubleshooting and a framework that you can use to customize alerts and views for your organization.
An application may still have a file open.
Close the application that is holding these files open.
Microsoft Help and Support for Microsoft Windows Server 2003
Microsoft Knowledge Base