This error usually is caused by a failure to connect to the data. The solution is to download and install the Microsoft Access Database Engine 2007 from our website: http://www.tableausoftware.com/support/drivers. Please note that Tableau Desktop is a 32 bit application and as such requires the 32 bit drivers found in the driver package mentioned above.
If this does not resolve the issue, please send the following additional information to firstname.lastname@example.org:
1. Screen shot of the error message, including the 'Show Details' information (if available)
2. Date and time of the issue
3. Log files (see http://www.tableausoftware.com/support/knowledge-base/sending-tableau-desktop-log-files for instructions on bundling and sending the log files)
Hope this helps!