title: Crystal Reports XI - Group not returned when adding field which might be null
body: <p>I'm a very new user of Crystal Reports with no training but with a very light background in programming.</p>
  
  <p>I have been working on a report which should show me some information regarding the order status of parts within my company. I have modified an existing report which had a lot of the information I was looking for and have added several fields containing more information I want to look up (information like stock, delivery date, suppliers and partnumbers). I have one last field I want to add to the report, which shows me the name of the supplier where the part is ordered.</p>
  
  <p><strong>Problem:</strong><br>
  When I add this field in the report, the groups where there is no information for this field disappear. When I remove the same field again, the missing groups return.</p>
  
  <p>I have tried to look everywhere for an option or function which suppresses a group when a field is null but can not find anything. I also have tried to add an isNull function to return a certain value when the field is empty, but with no results. Unfortunately I can't review the returned values because the group has disappeared when I add the field.</p>
  
  <p>This problem might have to do with the fact I started working from an existing report, but I have not been able to find a reason to believe so.</p>
  
  <p><strong>Update</strong><br>
  I have made some pictures showing the problematic result and the SQL-Query (I can only link to the folder in Onedrive because I'm not allowed to post more than two links at the same time):<br>
  <a href="http://1drv.ms/1J1enHj" rel="nofollow">http://1drv.ms/1J1enHj</a>  </p>