The following error text occur in the rigth pane:
Unexpected error occured: ‘Error in application.’
When trying to view the calculations tab (of any cube, including the samples that comes with SQL Server 2005) in Visual Studio (BI Development Studio) . This may cause by different versions of msmdlocal.dll and msmgdsrv.dll in %ProgramFiles%\Microsoft Visual Studio 8\Common7\IDE\PrivateAssemblies\ and %ProgramFiles%\Common Files\System\Ole DB\
If they are not the same, then try to update the ones in the PrivateAssemblies with the ones from ole db (Please backup the dlls just case…)