For some time now I've had a particular issue. One file of several in this particular solution could not be opened on the WAN. It asks for my credentials and then won't accept them. Thy are in my Keychain. ipad opens it fine (fm go 15) and it opens fine using FMPA 13 and 14. 15 opens it fine on the LAN. Reinstalled FMPA 15. No change. So I can come to no other conclusion than this is a fmp 15 bug.