title: Update Statement in ABAP not working
body: <p>I have an <code>UPDATE</code> statement in <strong>ABAP</strong> which looks like :</p>
  
  <p><code>UPDATE zicstt099 FROM TABLE lt_zicstt099</code></p>
  
  <p>The Update is failing every time with <code>sy-subrc eq 4</code>.</p>
  
  <p>The database Table <code>ZICSTT099</code> has three primary keys : <code>WEB_USER_ID</code> &amp; <code>EMAIL_ID</code> along with <code>MANDT</code> field.</p>
  
  <p>I am trying to change the <code>EMAIL_ID</code> value but the same is not getting Updated.</p>
  
  <p>Kindly help.</p>