Thank you DeeDee,
CSV file seems to be OK.
Actualy I tested just with two users before adding all faculty and students and found this problem.
I looked at Postgres server.log file also:
ERROR: ExecInsert: Fail to add null value in not null attribute username
WARNING: Error occurred while executing PL/pgSQL function acs_user__new
WARNING: line 54 at SQL statement
Volin
