Space Roleplay 3 Cakescript G2 error.

[Eshira\gamemode\cl_charactercreate.lua:50] attempt to concatenate field 'ChosenModel' (a nil value) is not a valid model!

-------------------------------
-- CakeScript Generation 2
-- Author: LuaBanana ( Aka Jake )
-- Project Start: 5/24/2008
--
-- cl_charactercreate.lua
-- Houses some functions for the character creation.
-------------------------------

TeamTable = {};

function SetUpTeam(data)

    local newteam = {}
    newteam.id = data:ReadLong();
    newteam.name = data:ReadString();
    newteam.r = data:ReadLong();
    newteam.g = data:ReadLong();
    newteam.b = data:ReadLong();
    newteam.a = data:ReadLong();
    newteam.public = data:ReadBool();
    newteam.salary = data:ReadLong();
    newteam.flagkey = data:ReadString();
    newteam.business = data:ReadBool();
   
    team.SetUp(newteam.id, newteam.name, Color(newteam.r,newteam.g,newteam.b,newteam.a));
    TeamTable[newteam.id] = newteam;
   
end
usermessage.Hook("setupteam", SetUpTeam);

ChosenModel = "";
models = {};

function AddModel( data )

    table.insert( models, data:ReadString( ) )
   
end
usermessage.Hook( "addmodel", AddModel );

function SetChosenModel( mdl )

    if( table.HasValue( models, mdl ) ) then   
   
        ChosenModel = mdl
       
    else
   
        LocalPlayer( ):PrintMessage( 3, CAKE.ChosenModel .. " is not a valid model!" );
       
    end
   
end

ExistingChars = {  }

function ReceiveChar( data )

    local n = data:ReadLong( );
    ExistingChars[ n ] = {  }
    ExistingChars[ n ][ 'name' ] = data:ReadString( );
    ExistingChars[ n ][ 'model' ] = data:ReadString( );
   
end
usermessage.Hook( "ReceiveChar", ReceiveChar );

local function CharacterCreatePanel( )

    CreatePlayerMenu( )
    PlayerMenu:ShowCloseButton( false )
    PropertySheet:SetActiveTab( PropertySheet.Items[ 2 ].Tab );
    PropertySheet.SetActiveTab = function( ) end;
   
    InitHUDMenu( );
   
end
usermessage.Hook( "charactercreate", CharacterCreatePanel );