Smart View/Excel A document with the name 'HsTBar.xla' is already open
I got this error message when starting Excel. The following fixed it:
1. Deleted shortcuts to HsTBar.xla in Documents and Setting
2. Disabled Smart View in Hyperion > About
3. Unchecked Hyperion Smart View for Office in Tools > Addins
4. Quit Excel
5. Started Excel
6. Enable Smart View Hyperion > About
I do not know exactly what fixed the problem as the error has not reoccured but hopefully this will help someone.