Family Settlement Suit

Mr. Z wrote a registered document of partition for partition of his estate among his Children A, B and C in 1949 stating that all of his children will have equal right in his property. In 1999 Mr. A , heirs of B and C signed a family settlement of partition for further identification that which part of the property will be shared by them from the said estate. This settlement was written on 10 Rupee stamp paper and the same was bought in 1994. This settlement was not registered. In 2006 Mr. B filed a civil suit for partition after being aggrieved from encroachment. In the proceeding of the court the family settlement of the partition was called upon by the court. The plaintiff reiterated all the conditions of above mentioned family settlement in his claim also." In the initial level of counter claim the defendant (A &C) accepted all the conditions of the family settlement in the reply presented in the court". Though the family settlement was not registered however in different points both A & C had accepted conditions of family settlement in the counter claim presented to the court. Mr. A sold part of his property without fulfilling some conditions of the settlement. Now plaintiff (B) amended suit for violation against A. In response to amendment Mr. A counterclaimed and refused to agree upon "family settlement" on which he has shown his agreement in 2006 itself. 1. Whether this subsequent rejection done by A is tenable in court after his previous acceptance. ? 2. Whether courts of law can accept such unregistered family settlement for partition when all the parties have agreed almost on all of the conditions to it?