Index: openacs-4/packages/acs-subsite/www/admin/applications/application-add.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-subsite/www/admin/applications/application-add.tcl,v
diff -u -r1.14.2.2 -r1.14.2.3
--- openacs-4/packages/acs-subsite/www/admin/applications/application-add.tcl	15 May 2019 18:05:12 -0000	1.14.2.2
+++ openacs-4/packages/acs-subsite/www/admin/applications/application-add.tcl	16 May 2019 08:15:46 -0000	1.14.2.3
@@ -22,7 +22,7 @@
 
 
 set main_subsite_id [site_node::get_node_id -url "/"]
-set main_subsite_p [expr {$node_id == $main_subsite_id}]
+set main_subsite_p [expr {[info exists node_id] && $node_id == $main_subsite_id}]
 
 set multiple_add_url [export_vars -base multiple-add { return_url }]