T4C with open changes

That should be adddressed in the termination notice. See FAR 49.102(a)(3) -"The notice shall state--,,,[t]he extent of termination") and FAR 49.002( - "Contractors shall use this part, unless inappropriate, to settle subcontracts terminated as a result of modification of prime contracts."

George, the open changes should be addressed in the Termination settlement if possible. It might be really fun trying to segregate costs between the change work and the original work to determine if and where the sub might be expected to bear a share of the costs on the base contract work if they would have incurred a loss had the subcontract been completed. It is harder to require the sub to share costs on undefinitized, uncompleted changes.

EDIT: The foregoing advice assumes that the subcontract is firm fixed-price.

Thanks, I thought I knew answer and you folks have confirmed it.