Index: openacs-4/packages/xowiki/tcl/form-field-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/form-field-procs.tcl,v
diff -u -r1.284.2.101 -r1.284.2.102
--- openacs-4/packages/xowiki/tcl/form-field-procs.tcl	20 Apr 2020 19:57:13 -0000	1.284.2.101
+++ openacs-4/packages/xowiki/tcl/form-field-procs.tcl	26 Apr 2020 07:52:40 -0000	1.284.2.102
@@ -916,7 +916,7 @@
         "contains" {set correct "... [join $args { ... }] ..."}
         "answer_words" {set correct "... [join $args { ... }] ..."}
         "in"       {set correct "... [join args { OR }] ..."}
-        "btwn"     {set correct "[index $args 0] <= X <= [index $args 1]"}
+        "btwn"     {set correct "[lindex $args 0] <= X <= [lindex $args 1]"}
 
       }
       if {[info exists correct]} {