Problem importin posts from phpbb2, not importing all the posts
 

I´m trying to import the posts from a phpbb2 forum using IMPEX 1.96.

There are 2.4 Million of posts to import, and i am trying different "post per cycle" values, and depending of this value the number of imported posts is different, and I don´t know why.

13.000 appears to be the best option, but the number of imported posts is 2.3 million and a hundred thousand posts dissapear and were no imported (the last ones).

Can you tell me some idea of this problem? i try with "post per cicle" values from 2.000 to 20.000, but no one result in a complete import.

Thank you in advance for your help,