[PsychoAlex]

Thanks for that, it's stopped the crashes.

However, for some reason my code isn't actually changing the players model.

PrintToChatAll("Start Class Check");
    if (TF2_GetPlayerClass(target) == TF2_GetClass("scout"))
    {
        SetEntityModel(target, "models/player/hwm/scout.mdl");
        PrintToChatAll("done");
    }else{
        if (TF2_GetPlayerClass(target) == TF2_GetClass("soldier"))
        {
            SetEntityModel(target, "models/player/hwm/soldier.mdl");
            PrintToChatAll("done");
        }else{
            if (TF2_GetPlayerClass(target) == TF2_GetClass("pyro"))
            {
                SetEntityModel(target, "models/player/hwm/pyro.mdl");
                PrintToChatAll("done");
            }else{
                if (TF2_GetPlayerClass(target) == TF2_GetClass("heavy"))
                {
                    SetEntityModel(target, "models/player/hwm/heavy.mdl");
                    PrintToChatAll("done");
                }else{
                    if (TF2_GetPlayerClass(target) == TF2_GetClass("engineer"))
                    {
                        SetEntityModel(target, "models/player/hwm/engineer.mdl");
                        PrintToChatAll("done");
                    }else{
                        if (TF2_GetPlayerClass(target) == TF2_GetClass("demoman"))
                        {
                            SetEntityModel(target, "models/player/hwm/pyro.mdl");
                            PrintToChatAll("done");
                        }else{
                            if (TF2_GetPlayerClass(target) == TF2_GetClass("spy"))
                            {
                                SetEntityModel(target, "models/player/hwm/spy.mdl");
                                PrintToChatAll("done");
                            }else{
                                if (TF2_GetPlayerClass(target) == TF2_GetClass("medic"))
                                {
                                    SetEntityModel(target, "models/player/hwm/medic.mdl");
                                    PrintToChatAll("done");
                                }else{
                                    if (TF2_GetPlayerClass(target) == TF2_GetClass("sniper"))
                                    {
                                        SetEntityModel(target, "models/player/hwm/sniper.mdl");
                                        PrintToChatAll("done");
                                    }else{
                                        PrintToChatAll("Class Not Found, No Model Set");
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }

The output I get is
Start Class Check
Done

I placed the Precashing in the OnMapStart() method