One or more layers failed to draw: Underlying RDMBS error

[SuzanneKelly1]

One,or,more,layers,failed,to,draw:Underlying,RDBMS,error,[[Microsoft][SQL,Server,Native,Client,10.0][SQL,Server]The,app,domain,with,specified,version,id,(706),was,unloaded,due,to,memory,pressure,and,could,not,be,found.

[GregBarnes]

I received the same error a while back.  It turned out to be a permissions issue.  The mapping user was not granted read-access to one of the tables in the database view I was using.  The view was visible and could be pulled into the map, but it would fail to render due to permissions.  Good luck!