Source: NCP Engine
Explanation: The file is in use and already in locked state.
Possible Cause: The file is in use by another user that has the file open for read and write.
Action: You can ask the other user to close the file, or retry the action later.
Possible Cause: The file is locked by another process that holds the file open for writes, such as a database.
Action: You might be able to stop the other process to close the file, or retry the action later.
Possible Cause: The file is locked by another process or user session that has terminated abruptly and left the file in a locked state.
Action: If no valid user or process has the file open, delete the connection to unlock the file.