Index: DOM/PM/Maatwerk/Calc/HF/HalffabItemsIterator.cls.xml
===================================================================
diff -u -r30286 -r37170
--- DOM/PM/Maatwerk/Calc/HF/HalffabItemsIterator.cls.xml	(.../HalffabItemsIterator.cls.xml)	(revision 30286)
+++ DOM/PM/Maatwerk/Calc/HF/HalffabItemsIterator.cls.xml	(.../HalffabItemsIterator.cls.xml)	(revision 37170)
@@ -65,7 +65,7 @@
 
 <Method name="Reset">
 <Implementation><![CDATA[
-	set ..CanCalculateNext = $$$true
+	set ..CanCalculateNext = $IsObject(..Boom)
 	set ..ItemIterator = ##class(TECH.Algo.Boom.DiepteEerstIterator).%New(..Boom)
 ]]></Implementation>
 </Method>