Hi, in such situation:
1. You've opened a "New record"
2. You have to supply some field that is required (e.g. contact), but you don't have this contact in the system.
3. Open a new browser tab (or window), navigate to the contacts and add a contact
4. Switch to the previous tab (or window) and click "Save" - Yes it will cause a form error, because of empty required field, but it will reload EPESI, that now knows about this new contact
5. Use select to choose proper contact. Click "Save" again.
Additionally if EPESI shows you a suggestbox (little yellow box) when you type contact (or company or any other record), then just stop typing, go to the second tab, add record, go back, retype to refresh suggestbox and you'll get this new record in the suggestbox.
Regards,
Adam