This error may occur when copying open/locked files and the files and the system is overloaded. The possible solutions are:
- This error may occur if you have other profiles running at the same time and they are also copying locked/open files
- Close any unnecessary programs, or pause them
- Defragment the partition the locked files are on (if it is a hard drive, not if using solid-state storage, e.g. an SSD)
By default SyncBackSE/Pro will wait a maximum of 5 minutes to be able to copy open/locked files from a drive. It is possible to change the amount of time to wait:
- Run SyncBackSE/Pro
- Select burger menu > Global Settings > Settings tab
- Click on the path inside the group-box with the title The settings are stored here. A Windows File Explorer window will open.
- Exit SyncBackSE/Pro now (it is vital that you now exit SyncBackSE/Pro, otherwise any changes made after this will not be saved)
- In the Windows File Explorer window double-click on the file settings.ini
- Go to the end of the file and add the following line:
VSSSleep=360000
- Save the file and exit the editor. Now run SyncBackSE/Pro.
- It will now wait 6 minutes for the VSS DLL to become available. The VSSSleep value is the number of milliseconds, so if you wanted it to wait 7 minutes, for example, you would set it to 420000
If you are still getting the same error then consider modifying the registry to tell Windows to use a larger area of the drive for VSS use:
- Run the Windows registry editor (regedit.exe)
- Navigate to the key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VolSnap\
- Modify (or create) the DWORD value MinDiffAreaFileSize
- The default size is 300 and the maximum is 3000. This is the minimum size (in megabytes) to use on a drive for VSS.
- Reboot
Microsoft also recommends that the Windows event logs are kept below 64MB in size. You can clear them, or set their maximum size, using the Event Viewer in Windows.