This lecture focuses on the technical jurisdictional aspects of an appeal that can prevent it from being heard on the merits and how these problems can, sometimes, be overcome. This lecture is intended to help lawyers avoid these problems themselves as well as raise them when opposing an appeal. Among the issues discussed are whether there is an appealable paper, whether there is a proper party, when final judgments cut off interlocutory appeals and when final judgments bring up for review interlocutory orders, whether there is an aggrieved party, whether a substantial right is affected, whether an issue has either not been preserved or has been waived, and issues such as mootness, harmless error, and alternate grounds for affirmance or reversal.