Hi Jim,
Error 102 is a FileMaker "field is missing" error and shouldn't be occurring from just adding additional fields to your source. It's likely that one of the fields mapped on your "Source No [X]" layout for that source number is mapped incorrectly or doesn't match the variables set at the top of your "DBk_WebViewerSource" calculation for that field.
If you have FileMaker Advanced, you can step through the "Edit / Create" section (lines 120-246) of the "Create Edit Delete Event..." script to see exactly which field is causing the 102 error.
I'd be happy to take a quick look at your file to troubleshoot if you'd like to send it into
[email protected].
Hope that helps!
Regards,
KC