Index: openacs-4/packages/dotlrn/tcl/apm-callback-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/dotlrn/tcl/apm-callback-procs.tcl,v
diff -u -r1.16 -r1.17
--- openacs-4/packages/dotlrn/tcl/apm-callback-procs.tcl	25 Apr 2018 19:47:47 -0000	1.16
+++ openacs-4/packages/dotlrn/tcl/apm-callback-procs.tcl	9 May 2018 15:33:30 -0000	1.17
@@ -266,7 +266,7 @@
             }
             2.3.0d1 2.3.0d2 {     
             # Set access keys for all pages that have known titles
-            set params {}
+            set params [list]
             db_foreach get_default_values {} {
                 set params [concat $params [split [string trimright $default_value ";"] ";"]]
             }