Mandatory pit stop in GT4 single player season

[NickB]

I started a GT4 season, and run full length races (2x60 min). I got disqualified for not changing my tyres in the mandatory pit stop, aren't the GT4 rules that there is only a driver change mid-race?

Thanks!

 

[Gevatter]

They didn't last year, you're right about that. Is it a custom season or the official one?

 

[NickB]

I just used the official GT4 one, very odd!