It surely helps, thank you for the explanation! The problem is that the SMF database structure is not fully compatible with xmb, and we have adapted it in the converter, but it needs one more adaptation:
The column id_cat in smf_boards table needs to be of a bigger integer type, i.e. smallint, mediumint or int, not tinyint as it comes with SMF by default.
You could do so in phpmyadmin, by:
- select your SMF database, and your smf_boards table
- in the 'structure' tab, 'edit' the id_cat column, and change the type, 'tinyint', to 'int'.
Please do keep a backup of your database before making such changes.
After this, your operations with boards and categories should work normally.
That means that the conversion missed a couple of your previous categories. If you wish, you can also, instead, try to reconvert, to have these back normally.
I will change the package above, with an updated one, in which the converter makes the change itself, so that boards fall normally under their respective categories during conversion process.