Final answer:
If the defendant fails to object immediately after a waiver of appearance, any objection is considered waived.
Step-by-step explanation:
If the defendant fails to object immediately after a waiver of appearance in a court case, any objection is considered waived and the defendant cannot raise it later on. Unlike subject matter jurisdiction, which deals with the court's authority to hear a particular type of case, a waiver of appearance addresses the defendant's agreement to proceed without being physically present in court.