Error saying "cannot find table 0" on executing a stored procedure from aras SQL item

Hi 

I'm facing once issue while using SQLs in Aras.

I've created a procedure with parameters to update an ItemType and calling the same from a server side method.

But when that procedure is executing (onAfterUpdate of itemType), its giving an error which says something like  "cannot find table 0 in sql stored procedure ......"

What could be the possible reasons for this? Please suggest how to resolve this.

Thanks.