Index: openacs-4/packages/dotlrn-ecommerce/lib/section.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/dotlrn-ecommerce/lib/section.tcl,v
diff -u -r1.18 -r1.19
--- openacs-4/packages/dotlrn-ecommerce/lib/section.tcl	27 Jul 2005 23:04:42 -0000	1.18
+++ openacs-4/packages/dotlrn-ecommerce/lib/section.tcl	1 Aug 2005 00:06:57 -0000	1.19
@@ -559,7 +559,9 @@
 
 	# Map patron relationships
 	set tree_id [parameter::get -package_id [ad_conn package_id] -parameter PatronRelationshipCategoryTree -default 0]
-	category_tree::map -tree_id $tree_id -object_id $community_id
+        if {!$tree_id == 0} {
+            category_tree::map -tree_id $tree_id -object_id $community_id
+        }
 
 	# Prerequisites
 	if { [info exists prerequisites] } {