Outlook 2011 database file rebuilding Error (..18000)

Dear All,

Thanks for your support in Advance... 

I require support to resolve beolw mention porblem in office 2011 (outlook)

I am using office 2011 for mac, in that i configured my office pop account and it is working fine from last three to four  month now suddenly if i open the outlook its showing to "There is a problem with the office database, to use databse you must rebuild it using database utility" so i cliked on rebuild after that database utility has been start and its starting rebuilding database file (Main Identity) but on step 4 of 5: Recovering data....its showing error like below 

Your database could not be rebuilt. [-18000]

 Please help me to sort out this issue 

Thanks,

Umesh Shetkar 

Contact No- +9822217567

E-Mail ID- *** Email address is removed for privacy ***

Location - Goa