         cb(undefined, m.s)
 
     rmd_to_html: (cb) =>
+        split_path = misc.path_split(@filename)
         @to_html_via_exec
             command     : "smc-rmd2html"
-            args        : [@filename]
+            args        : [split_path.tail]
+            path        : split_path.head
             cb          : cb
 
     rst_to_html: (cb) =>

            command     : required
            args        : required
            postprocess : undefined
            cb          : required   # cb(error, html, warnings)
        html = undefined
        warnings = undefined

            elt.find('link').remove()
            source = elt.html()

            if warnings
                @preview_content.html("<pre><code>#{warnings}</code></pre>")
            else
                # finally set html in the live DOM
                @preview_content.html(source)

                @localize_image_links(@preview_content)

                ## this would disable clickable links...
                #@preview.find("a").click () =>
                #    return false
                # Make it so preview links can be clicked, don't close SMC page.
                @preview_content.find("a").attr("target","_blank")
                @preview_content.find("table").addClass('table')  # bootstrap table

                @preview_content.mathjax()

                #@preview_content.find(".smc-html-cursor").scrollintoview()
                #@preview_content.find(".smc-html-cursor").remove()

            #console.log("update_preview time=#{misc.mswalltime(t0)}ms")
            if @_update_preview_redo
