Defendant's challenges to his sentence are unpreserved and we decline to review them in the interest of justice. Were we to review them, we would find them to be without merit. The court properly withdrew its promise of youthful offender treatment and probation since, by failing to complete a rehabilitation program, defendant violated the conditions of the plea agreement ( see, People v. Thompson, 246 A.D.2d 309), and the court was entitled to impose defendant's custodial sentence without first giving him an opportunity to withdraw his plea ( People v. Murello, 39 N.Y.2d 879). Defendant's claims of an alternate promise of "2 to 4 years" and ineffective assistance of counsel at sentencing are belied by the record.
The People's contention concerning the legality of the sentence may not be reviewed upon defendant's appeal ( see, CPL 470.15; People v. Pratt, 119 A.D.2d 839).
Concur — Milonas, J. P., Rosenberger, Ellerin and Andrias, JJ.