4   Object not found

Cause

This error occurs when your application logic attempts to access an object and the referenced object does not exist. The most-common situation in which this error occurs is when application logic accesses a feature of an object (for example, a method or property) using a reference to an object that existed when the reference was first obtained (for example, from a collection) and has since been deleted by a concurrent transaction.

A reference to a deleted object is deemed to be invalid.

Action

Determine why an invalid object reference is being used in this situation and then correct the logic to avoid the error, or code and arm an exception handler to handle the error.