Report an Issue is intended for reporting problems with the software (possible bugs) that filemaker may need to fix. This post would be better served in the Filemaker GO Forum (see tab at top of your screen).
Feel free to continue this thread here, but keep that fact in mind for any future questions you decide to post...
Exactly how did you set up the self join?
What you have described should work if FindDuplicates is a 2nd table occurrence of Prospects. If you hover the mouse over the arrow in the upper left corner of FindDuplicates and Prospects, does the same data source table name pop up for both?
Yes. Source table is Prospect for both tables.What am I missing?
It now works.I forgot to check the allow Updates on the Prospect table on the Join relationship.