Are you sure that you are using the correct wizard? The exception seems to be thrown from the Data Services Wizard, which is not the one used in the walkthrough. Please note that, as described in the Creating a Domain Service
section of the article, you need to invoke the OpenAccess RIA Wizard from the Add New Item
entry in the project's context menu. Then select the Telerik OpenAccess Domain Service
item template at the end of the list and click Add
Please let us know if this is not the case and the exception is indeed thrown by the OpenAccess RIA Wizard, we would need to investigate this further.
All the best,
the Telerik team
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