You need to help us, before we can help you. If you went to a doctor, and simply said "it hurts", the doctor would likely kick you out as a troublemaker. If you went to the doctor, and said "It hurts when I do this", and show the doctor what makes the pain, you may come away with a treatment.
In short, post the code that generates this error. And no, I do not mean
Code:
dbcc showcontig('tablethatobviouslydoesnotexist')
As I have said before, you should check the spelling of all of the parts involved. This includes the actual table name, and schema, as well as the table name and schema you are supplying to dbcc showcontig.