This error indicates that one of our temporary files was deleted between when Tivoli Storage Manager (TSM) processed the BES Client__BESData directory and when it backed it up. It is normal for there to be many temporary and frequently changing files in the __BESData directory, so it is not very useful to back this data up. I would recommend putting an exclude in place to prevent TSM from processing and backing up this directory and subdirectories using the following syntax in your TSM config file (dsm.opt):