Not able to log string.join value inside add log field

Hi Guys,
I am trying to log string.join value inside add log field but i showing null values, but i am getting the value when i use log message. Could anyone please help me with this.

I think it’s because the String.join methods requires the strings to be in a string array? Did you assign the strings accordingly to make it work with the method call?

https://www.google.com/search?source=hp&ei=nsXsWonqMqOE5wKqp4zIAg&q=string.join&oq=string.join

Hi @Long_Chen,
I have tried it with example . It is working well. Below I have attached sample for you.

File : logsSample123.zip (1.7 KB)

Regards
Balamurugan