When attempting to edit a letter in an Appeal Mailing the error: Object reference not set to an instance of an object appears.
We are currently evaluating this issue and will update this article when we have more information.
Steps to Duplicate
1. Marketing and Communications > Appeal Mailings > Select the affected appeal mailing. 2. Select the Letters tab > Click the drop down arrows next to the affected letter. 3. Click Edit 4. The pop up message appears: Object reference not set to an instance of an object.