Index: openacs-4/packages/dotlrn-ecommerce/www/admin/process-purchase-course.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/dotlrn-ecommerce/www/admin/process-purchase-course.tcl,v
diff -u -r1.25 -r1.26
--- openacs-4/packages/dotlrn-ecommerce/www/admin/process-purchase-course.tcl	26 Apr 2018 08:56:38 -0000	1.25
+++ openacs-4/packages/dotlrn-ecommerce/www/admin/process-purchase-course.tcl	9 May 2018 15:33:30 -0000	1.26
@@ -78,7 +78,7 @@
     dotlrn_ecommerce::check_user -user_id $participant_id
 }
 
-set validate {}
+set validate [list]
 
 # Search course or section
 set section_list [linsert [db_list_of_lists sections {