             timeout     : 30
             err_on_exit : false
             bash        : false
+            allow_post  : true
             cb          : required
         #console.log(opts.path)
         #console.log(opts.command + ' ' + opts.args.join(' '))

        if not target?
            target = @base_filename + '.sagetex.sage'
        @_exec
            command : 'sage'
            args    : [target]
            timeout : 45
            cb      : (err, output) =>
                if err
                    cb?(err)
                else


                #console.log('gs ' + args.join(" "))
                @_exec
                    command     : 'gs'
                    args        : args
                    err_on_exit : true
                    timeout     : 120
                    allow_post  : false
                    cb          : (err, output) ->
                        cb(err)

            # delete the copied PDF file, we no longer need it (might use up a lot of disk/memory space)
