I have bbPress installation that shares user tables with the WordPress installation. When I try to import data to new format, I get following errors for each topic/reply:
WordPress database error: [Table 'bb_usermeta' doesn't exist]
SELECT user_id FROM bb_usermeta WHERE meta_key = 'bb_favorites' AND FIND_IN_SET( 140, meta_value ) > 0
This is only for favorites data, but still, this should be fixed.
http://wordpress.org/extend/plugins/bbpress/
Weird. If your users tables are shared, I wonder why bbPress thinks 'bb_usermeta' is the name of your users tables. It should be getting the table names directly from you wp-config.php and bb-config.php files, respectively.
Are you able to trouble-shoot or investigate further?
I couldn't wait for the solution, since the support forum needed to be transfered quickly, so I simply made a copy of WP users tables to BB users tables to make import.
But, bb-config.php doesn't have users tables names set at all. I was using latest SVN trunk version of the bbPress, and integration with WP was controlled by some database settings, including the users tables.
Milan