title: Replacing a string in Mainframe dataset
body: <p>Can we replace part of data with another string in Mainframe?
  e.g. Suppose I have a PS of length 80.
  From col 72 to 80 some line numbers are present.
  I want to change these line numbers by particular string say TEST.
  Can we use any form of "C ALL" to achieve this???
  ABC File---</p>
  
  <pre><code>=COLS&gt; -1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
  000004    text123                                                      12360002
  000005    textabc                                                      12370002
  </code></pre>
  
  <p>Regards,
  Saisha</p>