Whether the settlement concluded on 2012-09-05 ended the appeal proceedings and justified striking the case from the roll.
Yes. The settlement had the effects of a final decision and terminated the appeal proceedings, so the case had to be removed from the roll.
Under Art. 241 CPC, a settlement ratified by the court has the effects of a final decision; pursuant to Art. 241(3) CPC, the proceedings end and the case is struck from the roll.