Issue while using Create EML File smart service

Hello All,

I am using email listener in start node and able to read the email content in to process variables using striphtml function.  But when I am trying to create EML file using "Create EML file" smart service, Its throwing error saying "Null arguments are invalid". 

Please provide your inputs if anyone faced this issue before?

Also please provide suggestions if there is any other way we can store the email content as a document without using "Create EML file" smart service?

Thanks in advance!!

Sujitha