Symptoms
When the auto-complete control is configured to get data from a smart object the view errors with 200 Parse error in runtime and does not work. If the control is not configured it loads the view fine.
Diagnoses
Appears that the SmartObject is returning too much data for the server to handle.
Resolution
TFS 552241 and 552242 created to give a better error message.
Workaround:
The SmartObject had 68 properties and returned 6,000 to 7,000 rows of data.
The client created a second SmartObject that only has 3 of the properties and the control now functions as required.