Sorry. This forum format is not the easiest to use. I did a direct download of the Dropbox files. The primary content.xml file was pointing to the Dropbox folder of the other person working on the files. I modified both “file” entries in that file, replaced the file in the .ODB structure and opened the revised file. I got the same error but it referenced the other person’s Dropbox folder. I searched all the .XML files in all folders, but could not find anything. Stumped.
JohnD