Switch -DH - open shared files
Allows to process files opened by other applications for writing.
This switch helps if an application allowed read access to file, but if all types of file access are prohibited, the file open operation will still fail.
This switch could be dangerous, because it allows to archive a file, which at the same time is modified by another application, so use it carefully.
If -dh is not specified, processing of shared files depends on the option "Open shared files" in the default compression profile.
Example
WinRAR a -dh dbf *.dbf