A filename was specified in a command but the specified file could not be opened by the server.
The command fails.
Examine any messages that might appear prior to this one in the activity log to determine if the error can be found. If the file was to exist for use by the command, ensure that the file does exists and that the server has proper authority to access the file. If the file was to be created by the command, ensure that the filesystem has sufficient space and that the server has authority to create the file in the location specified.