There are a few possibilities when the relevantId message is displayed:
[ Point 1 ]
Surveys are generally written by a client and then suppliers are requested to have their members attempt the survey. If the member is associated with multiple suppliers then they are likely to only be allowed to attempt with their first supplier.
[ Point 2 ]
There are too many reasons to list, however a more common one is when the IP address is not deemed to be from Australia. If a VPN is used this will often be detected and flagged as invalid.
[ Point 3 ]
Some surveys limit the number of starts to 1 only. This is generally based on the type of research required. I.e. There are times when the client's need the survey taker to only see the materials once and then form an opinion.
If the survey session closes for any reason that type of survey will not allow the survey taker back in.