Advert map retrieval failed with code 77

[NatSurvivorsNW]

Hi,

Every 20 minutes exactly I'm seeing this error in my server log files.

ERROR [ADVERT sid=1] Advert map retrieval failed with code 77

There are no errors at all apart from this. Can anyone shed any light on what the error message means?

I've not scheduled any Adverts: as yet.

Thanks very much.

Stephen