We are using the function below in set point event handler, and having problem viewing the unit of "°C". Other units such as %, C or A seems very well.

The message in event list is "Datasource1 - Point1 has exceeded 50 °C", but when we use in script it seems like "Datasource1 - Point1 has exceeded 50 ?"
How we can fix this?

var message = evt.messageString;

Thanks in advance!!