Symptoms

Generating a SmartObject from the smartobject administration pages throws an error:

Exception of type 'System.Web.HttpUnhandledException' was thrown. extender control''GUID]' is not a registered extender control. Extender controls must be registered using RegisterExtenderControl() before calling RegisterScripDescriptors(). Parameter name: extenderControl.
 

Diagnoses

n/a
 

Resolution

A coldfix must be applied, for this contact K2 support.