Thanks a lot.
Server is mine and timeout is already quite high (240 seconds)
I tried to recalculate giving 1 as "user per cycle" but now it seems to recalculate all users summing the results all in one user: 546
Recalculation page refresh after each user, but the userid shown is always 546 and data is summed up to the same user
I reset all the point and retried but it behaves always the same