Yes, I though to do that.In fact, I deleted arcade platform and the new one I change the name to mame, I though that was fix doing this, because this problem is ramdom, its not happen all the time, but yesterday is happen again.The only reason I dont delete both is that mame have many games, and when I added then I waste a lot of time deleting all the games that I dont play and I dont want to do that and see that after that the problem persist.
If I could know that any xml. has corrupted or I can edit to fix it we wonderful, because this issue is ramdom, its not happen all the times, I dont know, Im embarrased.
Thanks for your answer, anyway.