How to attach a downloaded file to a mail with mimemail?

Hi,

I need to send pdfs by email.
I've downloaded the module and I don't understand how I can generate and attach the PDF.
I'm working with print module.

This is my rule:

{ "rules_generate_pdf" : {
    "LABEL" : "Generate and send PDF",
    "PLUGIN" : "reaction rule",
    "OWNER" : "rules",
    "TAGS" : [ "invoice", "teacher" ],
    "REQUIRES" : [ "rules", "rules_download", "mimemail" ],
    "ON" : { "node_update--invoice" : { "bundle" : "invoice" } },
    "IF" : [
      { "data_is" : { "data" : [ "node:field-inovice-status" ], "value" : "ok" } },
      { "entity_has_field" : { "entity" : [ "node:field-student" ], "field" : "field_mail" } }
    ],
    "DO" : [
      { "rules_download_action_generate_path" : {
          "USING" : {
            "path" : "printpdf\/[node:nid]",
            "cookie" : 1,
            "uri_scheme" : "public",
            "temporary" : 1
          },
          "PROVIDE" : { "rules_download_file" : { "rules_download_file" : "Downloaded file" } }
        }
      },
      { "rules_download_action_realpath" : {
          "USING" : { "file" : [ "rules-download-file" ] },
          "PROVIDE" : { "rules_download_file_path" : { "rules_download_file_path" : "File real path" } }
        }
      },
      { "mimemail" : {
          "key" : "invoice_[node:nid]",
          "to" : [ "node:field-student:field-mail" ],
          "subject" : "Factura [node:field-text1]",
          "body" : "Your invoice.",
          "attachments" : "[rules-download-file-path:value]",
          "language" : [ "" ]
        }
      }
    ]
  }
}

Thanks!