Inserting a Modeled Object in Part Wizard Item

Hi All,

Have anybody have created this kind of Senario ??

Please let me know. I am Inserting a Wizard Item and in 1 single Wizard i am trying to persist 2 Object (Part and LineItem) in the Part Wizard.

Line Item is a Modeled Object.

I am facing some error while completing the Part Wizard.

Nested exception is: wt.util.WTException:
CreateEditFormProcessorHelper.getTypeInstance() - sourceObj must be a
TypeInstance, TypeInstanceIdentifier, or TypeIdentifier

wt.util.WTException: CreateEditFormProcessorHelper.getInProgressItemInstance():
Unable to create an in-progress instance of the object.

Please let me know any idea ??