[Karkand]

I've recently been working with INVALID_VEHICLE_ID and have discovered it will make your command return unknown.

pawn Код:

CMD:vid(playerid, params[])
{
if(isnull(params)) return SendClientMessage(playerid, -1, "Usage: /vid [vehicle id]");
if(strval(params) == INVALID_VEHICLE_ID) return SendClientMessage(playerid, -1, "Invalid vehicle.");
SendClientMessage(playerid, -1, "Vehicle valid.");
return 1;
}

That is just an example. ^