Just thought I would share this. I have had 2 users start to generate this message from the title. I reviewed older discussions but could not find clear explanation. I think I may have solution. A few observations:
1. Both clients running FMP 14
2. Both clients had old folder in Program Files for FMP 12
3. Both clients got message starting after upgrade of Adobe Reader DC
The problem seems fixed by doing the following:
1. Deleted old FMP 12 folder
2. Replaced entire dictionary folder in Extensions with folder from a user that was not receiving message
I uninstalled and reinstalled Adobe on one user, but not the other, and this didn't seem to make a difference. I hope this helps somebody out!