When I export the following snippet, I get an error. See attachments
for details.

    * Commands in library ~helm-sys~

    ** top
       :PROPERTIES:
       :DESCRIPTION: Brief summary of what Org does.
       :END:

    - ~helm-top~ ::

      #+findex: helm-top

      #+kindex: C-x c t

      Preconfigured ~helm~ for top command.