I try to check if two fields in a form have values or not. But my logic doesn't work. May you have some idea what's wrong?
<check expr="@Offer_Category == null and @PDF_Link == null">
<error>Please check that PDF_Link or Offer Category are not empty.</error>
Many Thanks and best regards
thanks for your fast response. I Tried your assumtion. Unfortunately without success. Could it be that the "<leave>" is on the wrong place? Or do you have other ideas?
Many thanks and best regards
Try using expr="[@Offer_Category] == '' and [@PDF_Link] == ''"