You may get a similar message when attemptiong to backup using TSM. The error reads:
19:11:02.157 4500 Main SLSMain::StartOperation XML return:
<MESSAGES>
<INFO>LiteSpeed(R) for SQL Server Version 6.1.0.1324
Copyright 2010 Quest Software, Inc.</INFO>
<ERROR error="10405">LiteSpeed for SQL Server could not open backup file: (QUESTSERVER\Warehouse_Diff.bak).
