[DeathTone]

pawn Код:

}
public OnPlayerEnterCheckpoint(playerid)
{
//  if(IsPlayerInAnyVehicle(playerid)) return 0; optional
    if(IsPlayerInRangeOfPoint(playerid,1,1739.2129,-1944.4154,13.5667)) 
    {
        ShowPlayerDialog(yadayadayada)
        return 1;
    }
}

This should work

It works perfectly for me

Btw you dont really need to name your checkpoints, this would work for any checkpoints, just make an IsPlayerInRangeOfPoint