Control Charecters replacement

@Priyanka Mynepally 

can you please try to use below expression in expression evaluator and check if it helps.

str.replaceAll("[^a-zA-Z0-9]", " ")

kindly provide me the sample inputs , os i can give a try and if it works then i can provide you the sample pipeline for that .

@Priyanka Mynepally, before replacing these characters, make sure you are using the right encoding-decoding. These characters might be some valid data in other language that you are replacing with null.