modified   gnucash/report/business-reports/new-owner-report.scm
@@ -263,6 +263,10 @@
   (let* ((lot (xaccSplitGetLot split))
          (invoice (gncInvoiceGetInvoiceFromLot lot))
          (post-txn (gncInvoiceGetPostedTxn invoice)))
+    (gnc:pk 'lot-split->posting-split split)
+    (gnc:pk 'lot lot)
+    (gnc:pk 'invoice invoice)
+    (gnc:pk 'post-txn post-txn)
     (and (not (null? lot))
          (not (null? invoice))
          (not (null? post-txn))