Join Date: Sep 2006
Location: Santo Domingo, Dom. Rep. / Washington, DC
Programs: AA PPro/DL PLT, PPass, Marriott / Hilton Gold, JetBlue Mosaic, Hertz Presidents Circle, Amex Plat
Posts: 4,789
There are two possible error messages that prevent passengers from doing OLCI, and in my experience:
Contact Reservation Agents: Manual check-in needs to be done
Check-in cannot be completed due to government regulations: SSSS
Others experiences may vary, these are based on my own observations.