Index: openacs-4/packages/xowiki/tcl/xowiki-utility-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/xowiki-utility-procs.tcl,v
diff -u -r1.57.2.3 -r1.57.2.4
--- openacs-4/packages/xowiki/tcl/xowiki-utility-procs.tcl	12 May 2019 16:31:12 -0000	1.57.2.3
+++ openacs-4/packages/xowiki/tcl/xowiki-utility-procs.tcl	23 Jul 2019 14:15:00 -0000	1.57.2.4
@@ -488,7 +488,7 @@
   } {
     ns_log notice "got package_id=$package_id, object_id=$object_id, type=$type"
     ::xowiki::Package initialize -package_id $package_id
-    if {[::xotcl::Object isobject ::$package_id]} {
+    if {[nsf::is object ::$package_id]} {
       return [::$package_id package_url]
     } else {
       return ""