 the release shall not release any claim or cause of action based on the failure of [Allegheny Ludlum] to perform any obligation which [Allegheny Ludlum] has to [Allegheny International] under said agreement dated November 00, 0000 (other than obligations under Sections 00(a)(ii) and (iii) thereof) or under any other written obligation to [Allegheny International] which was to have been performed by [Allegheny Ludlum] at or prior to February 00, 0000.   00 See release, at 0-0 (Allegheny Ludlum br. Tab G).  A