@Nicolas11 If you try to NEFILE a return for someone who has never filed a return because, you'll get this error, because the CRA computers are trying to match the name & address that's on the return with what they have on file. Since the person has never filed before, the CRA usually doesn't have that info, so NETFILE fails.
Most people have to print and mail their first returns, but they will be able to NETFILE after that.
