shaselai
what is the rationale behind not releasing the info? the test changes every month so knowing what you got wrong on or just a small summary report shouldnt be a big deal no? Also wouldn't it be in their interest to offer a service like that to charge extra money for?
Well it would be much easier for prep companies to copy questions. I suppose it would also limit the amount of complaints by those that think the OA is wrong.
I also understand why they won't even release the number of questions wrong: they don't want people to arbitrarily solve the GMAT scoring algorithm. (then test takers will complain about getting more questions right than other test takers yet getting a lower score)
You should know your weaknesses during your studies. Hopefully, it didn't take all the way till the real test to identify these weaknesses.