Deploy Smart Object Error(Index was out range)

Hi 2 One & All, 

Deploy smartobjects: Task error: Error:  Deserializing Type: 'SourceCode.SmartObjects.Authoring.SmartObjectDefinition'  Name: 'GetCaseInfo' Message: 'Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index'.

CAN  ANY HELP ME..

THANKS

SEENU