[WINTCL] can't read "Config(use_theme)": no such element in array

[Abhishek T. <abh...@au...>]

can't read "Config(use_theme)": no such element in array
    while executing
"set look::theme_value $Config(use_theme)"
    (procedure "look::theme" line 8)
    invoked from within
"look::theme"
    (procedure "translation::inputTagSubmitImage" line 14)
    invoked from within
"translation::inputTagSubmitImage "Edit Recency""
    ("eval" body line 38)
    invoked from within
"eval $tab_code"
    (procedure "look::save_edit_load" line 199)
    invoked from within
"look::save_edit_load $table_name $key_field_name $fields_and_defaults
$end_url $section $read_only_fields $tab_definitions $foreign_fields
additional ..."
    (procedure "list_admin::new" line 358)
    invoked from within
"list_admin::new $is_new_list"
    (procedure "perf_test::create_list" line 162)
    invoked from within
"perf_test::create_list "marketing" "list1" "list for perf_test"
$current_user_cache "per...@gu..." $current_password_cache
1"
    (procedure "perf_test::do_first_list" line 11)
    invoked from within
"perf_test::do_first_list"

Please help me resolve this error
Regards
Abhishek