Index: openacs-4/packages/xowiki/tcl/xowiki-form-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/xowiki-form-procs.tcl,v
diff -u -N -r1.147.2.5 -r1.147.2.6
--- openacs-4/packages/xowiki/tcl/xowiki-form-procs.tcl	15 Jul 2019 12:14:28 -0000	1.147.2.5
+++ openacs-4/packages/xowiki/tcl/xowiki-form-procs.tcl	29 Aug 2019 13:34:33 -0000	1.147.2.6
@@ -480,7 +480,7 @@
         {f.name  "= optional,help_text=#xowiki.File-name-help_text#"}
         {f.title "= optional"}
         {f.text
-          {upload_file:file(file)
+          {upload_file:file(file),optional
             {label #xowiki.content#}
             {html {size 30}} }}
         {validate {