KB41302: "[ODBC Excel Driver] '(unknown)' is not a valid path." error message appears when reading the warehouse catalog in MicroStrategy Desktop 9.2.x against and Excel datasource.

SYMPTOM:
Whenever reading the warehouse catalog in Strategy Developer 9.4.x-10.x, users receive the error below:
 

'(unknown)' is not a valid path.  Make sure that the path name is spelled correctly and that you are connected to the server on which the file resides.

1. Go to the ODBC Administrator
2. Configure the Excel DSN that is being used
3. Manually enter in the full file path of the directory or NAS (Network Attached Storage) directory where the database name is requested 

WORKAROUND:
There have been instances where customers could not modify this through the ODBC Administrator.  In those cases this can be accomplished manually within the registry editor.

1. Within the registry editor navigate to  HKey_Local_Machine\software\Wow6432Node\odbc\odbc.ini\<DSN Name>
2. Modify the DefaultDir and DBQ fields with the full file path

 
Registry Modification:
Modifying registry values incorrectly may cause serious, system-wide problems that may require the re-installation of Microsoft Windows. Any edit of the registry is done at the user's own risk. Since these are user-initiated changes, they are not covered by any Strategy warranty. If using Microsoft Windows, the user should backup the registry and/or update an Emergency Repair Disk (ERD) prior to alterations.