Package has a VignetteBuilder field but no prebuilt vignette index.

[Hannah Gaudet]

Hi all,

I've seen others running into the same note, but my code seems to be different from theirs - has anyone caught and figured out how to fix this? I'm trying to get my package ready to submit to CRAN. I'm running R 3.3.1

When I run R CMD CHECK --as-cran package_version.tar.gz, the last remaining note is:
* checking CRAN incoming feasibility ... NOTE
Maintainer: Author Name
Package has a VignetteBuilder field but no prebuilt vignette index.

my vignette .Rmd file looks like:
title: "title"
author: Author Name
date: "`r Sys.Date()`"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{title}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}

The DESCRIPTION file suggests knitr, rmarkdown and has VignetteBuilder rmarkdown.

Thanks in advance!