RestDataSource update validation errors do not show up

[apara]

I have a RestDataSource which calls a REST method on my server which in turn returns the following:

{"data":null,"status":-4,"errors":{"name":[{"errorMessage":"Name must not be less than 2 characters"}]}}

Yet the error does not appear on the Grid as it does in the showcase. Is there anything else I need to do to get this to work? I followed for the format of the response from the JavaDoc.

Thanks.
-AP_