Error message when you try to open the Mapping tab in Microsoft Dynamics CRM 3.0: "Query Builder Error. No Attribute"

After you delete an attribute that was mapped to another attribute, you receive the following error message when you try to open the Mapping tab in Microsoft Dynamics CRM 3.0:

This problem is fixed in Microsoft Dynamics CRM 3.0 Update Rollup 2. For more information about Microsoft Dynamics CRM 3.0 Update Rollup 2, click the following article number to view the article in the Microsoft Knowledge Base: Important This fix prevents the problem. However, this fix does not resolve the problem that you may currently be experiencing. To resolve the problem that you may currently be experiencing, contact Technical Support for Microsoft Dynamics and related products.

For more information about the terminology that is used to describe Microsoft software updates, click the following article numbers to view the articles in the Microsoft Knowledge Base: