Fetch() ignore row when sub-class does not exist

core/dbobjectset.class.php

@@ -979,9 +979,17 @@ class DBObjectSet implements iDBObjectSetIterator
 						$oRetObj = null;
 					}
 					else
+					{
+						try
 						{
 							$oRetObj = MetaModel::GetObjectByRow($sClass, $aRow, $sClassAlias, $this->m_aAttToLoad, $this->m_aExtendedDataSpec);
 						}
+						catch (CoreException $e)
+						{
+							$this->m_iCurrRow++;
+							$oRetObj = $this->Fetch($sRequestedClassAlias);
+						}
+					}
 					break;
 				}
 			}