Anyone seen this message?

[Carol Walter <walterc(at)indiana(dot)edu>]

Hello, Everyone,

You've been really helpful it the past; I sure hope someone knows  
this one.  When I try to describe the tables of one of my users the  
system returns the message as follows:
"column i.indisvalid does not exist"
It doesn't give any other info.  Has anyone seen this message, and  
more importantly, what do I do about it.

Thanks so much,

Carol