Thread:Help talk:Installation/How to migrate to SMWSQLStore3 without shell access?/reply (5)

Probably you added  to your LocalSettings.php before doing this.

This worked for me:
 * 1) Back up you installation and database
 * 2) Set   in your LocalSettings.php
 * 3) Move the new files for SMW and Validator into the extensions directory
 * 4) Go to Special:SMW-Admin and hit "Initialise and upgrade tables"
 * 5) Return to Special:SWM-Admin and hit "Start updating data"
 * 6) Add   to your LocalSettings.php below the enableSemantics line
 * 7) Comment out
 * 8) After the data refresh is done you do step 2) again
 * 9) Comment out   in your LocalSettings.php
 * 10) Do step 5) again
 * 11) Do step 6) again
 * 12) Remove   from your LocalSettings.php
 * 13) After the second data refresh is done you remove   from your LocalSettings.php
 * 14) Voilà, your are on SMWSQLStore3. Paradise regained. :)

I also posted this to the mailing list.