title: How to prevent user from entering special characters (like symbols not visible in keyboard) in a text field (Character type)?
body: <p>How to prevent user from entering special characters (like symbols not visible in keyboard) in a text field (Character type) in AS400 ?? 
  Visibly most of the time there is no issue for iseries/as400 in accepting it and saving it into the file but sometimes when the data is handled in downstream reporting system it get rejected with different error in their system. Is there a way to prevent from the entry point itself ?</p>
  
  <p>eg: In Address field of a Customer, end user copy paste (ctrl + c ctrl + v ) details from a webpage or a document causing entry of junk characters or null values which get stored without issue but later cause problem in other reporting applications. </p>