Somewhere in your converted file, you have a reference to a file named " Master Contact List", those leading spaces look odd in your dialog. This file has either been removed, moved or renamed and thus FileMaker can't find it. If you can open and use the file without this file, Open Manage | External Data Sources, find this file reference and delete it.
Phil, thanks for getting back to me on this. The previous owner of this file added a few spaces to the beginning of the name so she doesn't have to sort it.
But I tracked the file down and it seems to be in the same place where it was supposed to be. I also went under File -> Manage -> External Data / and Database, both seem to have the " Master Contact List" in the list.
So I don't understand why whenever I open an old file, it doesn't pull up.
Thanks again Phil for your help.
Something is different with regards to relative locations of the two files or its file name. It could be that your new file is in a different location not that Master Contact List is in a new location.
Open Manage | External Datasources, find this reference (there can be more than one so check all of them), and use the Add File button to add a new file reference to this file. Delete the original reference.