Legal Question in Landlord & Tenant Law in California

Likely in the stipulation you agreed to move out by a certain date. In exchange, perhaps the landlord waived a certain amount of back rent if that was the issue. In addition, most of the agreements release all claims by both parties against each other, including those known and unknown, and which might even arise later out of the issues in the complaint. If that was included in your stipulation -- including waiver of Civil Code section 1542 -- the landlord's lawyer might be correct. You might want to have a lawyer review your agreement. The fact that the UD case was dismissed with prejudice might not help you if you agreed that when you fully performed your part of the agreement, the case would be dismissed.