Oracle Database Discussions

Dear all,

The DB that I am working with is 10g.

After executing this :

 
select count(*) 
from table_1 

I got this:

 
Error starting at line 1 in command: 
select count(*) 
from cons_relationship 
Error report: 
SQL Error: ORA-08103: object no longer exists 
08103. 00000 -  "object no longer exists" 
*Cause:    The object has been deleted by another user since the operation 
           began, or a prior incomplete recovery restored the database to 
           a point in time during the deletion of the object. 
*Action:   Delete the object if this is the result of an incomplete 
           recovery. 

Any idea what can be the cause? How can I see if I have other objects in the DB that are corrupted?

Thanks a lot in advance for the help!