Specifies the wait delay during which the backup process waits until the source database lock is released.
property WaitDelay: integer default 250;
Set the WaitDelay property value to specify the number of milliseconds during which the backup process waits until the source database lock is released.
When during the backup process the source database becomes locked by an outside connection, then if the WaitWhenLocked property is set to True, the backup process waits for WaitDelay milliseconds until WaitTimeout is reached. If the source database lock is released, the backup process continues. Otherwise, the appropriate exception is raised.
The default value is 250.