Following these guidelines to determine the existence of subject matter jurisdiction, the court in the instant matter, holds that it does indeed have jurisdiction over this type of landlord-tenant proceeding. A proper demand must fairly afford notice to the tenant of the approximate sum of rent due and of the particular period for which such claim is made. (Schwartz v Weiss-Newell, 87 Misc 2d 558.) The court finds that respondent, by agreeing to the entry of a consent judgment, and by appearing numerous times in court with orders to show cause, was fairly apprised of the amount due and owing to the landlord. Accordingly, at this time in the proceedings, respondent may not be permitted to assert that a condition precedent to the institution of a nonpayment summary proceeding has not been fulfilled. Respondent has waived the defense of lack of subject matter jurisdiction by her active participation in the proceedings and by failing to raise said issue until her posteviction retention of counsel.