[BUG]: [function:COOL function] ReferenceError: msg3 is not defined (line 53, col 5) about nodered_heishamon_control HOT 4 CLOSED

var F_COOL                      = global.get('F_COOL',"file");
    if (F_COOL === undefined || F_COOL.setpoint_requested === undefined) {return null}
var TOP20_ThreeWay_Valve_State  = global.get('TOP20_ThreeWay_Valve_State');
var TOP4_Operating_Mode_State   = global.get('TOP4_Operating_Mode_State',"file");
var TOP0_Heatpump_State         = global.get('TOP0_Heatpump_State',"file");

let msg1 = {};    // calculated_dew_point
let msg2 = {};    // calculated_setpoint_lower_limit
let msg3 = {};    // final setpoint

//
//  TOP20_ThreeWay_Valve_State  = 0 (ROOM)
//  TOP4_Operating_Mode_State  = 1, 5  TOP20=0
//
//// Operating mode     0=Heat only,     1=Cool only,       2=Auto(Heat),       3=DHW only,       4=Heat+DHW,      5=Cool+DHW,       6=Auto(Heat)+DHW,       7=Auto(Cool),     8=Auto(Cool)+DHW
////////////////////////////////////////////////////////////////////////////////
//                          DEW POINT CALCULATION                             //
////////////////////////////////////////////////////////////////////////////////
if (F_COOL.RelativeHumidity !== undefined && F_COOL.Temperature !== undefined && F_COOL.safety_margin !== undefined && F_COOL.manual_setpoint_lower_limit !== undefined) {
    
    var A = Math.log(F_COOL.RelativeHumidity / 100) / Math.log(2.718282) + 17.62 * F_COOL.Temperature / (243.12 + F_COOL.Temperature);         // BLB 20230405 corrected Td calculation
    var Td = 243.12 * A / (17.62 - A);
    
    // let msg1={};    // calculated_dew_point
    // let msg2={};    // calculated_setpoint_lower_limit
    // let msg3={};    // final setpoint

    msg1.payload = Td;
    msg1.payload = Number(msg1.payload).toFixed(2);
    msg1.payload = parseFloat(msg1.payload);
    msg1.topic = "Dew Point (°C)";
        global.set("F_COOL.calculated_dew_point",msg1.payload,"file");

    msg2.payload = Td + F_COOL.safety_margin;
    msg2.payload = Number(msg2.payload).toFixed(2);
    msg2.payload = parseFloat(msg2.payload);
    msg2.topic = 'Setpoint lower limit';
        global.set("F_COOL.calculated_setpoint_lower_limit",msg2.payload,"file");

    msg3.payload = Math.ceil(msg2.payload);
    if (msg3.payload < F_COOL.manual_setpoint_lower_limit)  { msg3.payload = F_COOL.manual_setpoint_lower_limit; }
    if (F_COOL.setpoint_requested > msg3.payload)           { msg3.payload = F_COOL.setpoint_requested; }

    // Check if heatpump is on. if not, do nothing / exit
    if (TOP0_Heatpump_State === undefined || TOP0_Heatpump_State == 0) { return null } 
    
    // check if COOL is in the current operating mode. if not, do nothing / exit
    if (TOP4_Operating_Mode_State === undefined || TOP4_Operating_Mode_State == 0 || TOP4_Operating_Mode_State == 2 || TOP4_Operating_Mode_State == 3 || TOP4_Operating_Mode_State == 4) { return null }

    msg3.topic = 'new setpoint';
    return msg3 

}


// If there is no humidity or temperature sensor data, the requested setpoint will be sent.
if (F_COOL.RelativeHumidity === undefined && F_COOL.Temperature === undefined) {
    msg3.payload = F_COOL.setpoint_requested
    msg3.topic = 'new setpoint';
    return msg3 
}