title: pandoc document conversion failed with error 1 after update to R version 3.4.2
body: <p>After updating to R Version 3.4.2 my flexdashboard documents with shiny do not work anymore.  </p>
  
  <p>Even if I try to run a copy of that example <a href="https://jjallaire.shinyapps.io/shiny-biclust/" rel="noreferrer">https://jjallaire.shinyapps.io/shiny-biclust/</a><br>
  I got that </p>
  
  <blockquote>
    <p>'Error: pandoc document conversion failed with error 1'</p>
  </blockquote>
  
  <p>.  </p>
  
  <p>Until now I did not find an answer to that error during my websearch.
  I also updated all packages.</p>
  
  <p>My sessionInfo:</p>
  
  <pre><code>R version 3.4.2 (2017-09-28)
  Platform: x86_64-w64-mingw32/x64 (64-bit)
  Running under: Windows 7 x64 (build 7601) Service Pack 1
  
  Matrix products: default
  
  locale:
  [1] LC_COLLATE=German_Austria.1252  LC_CTYPE=German_Austria.1252    LC_MONETARY=German_Austria.1252
  [4] LC_NUMERIC=C                    LC_TIME=German_Austria.1252    
  
  attached base packages:
  [1] grid      stats     graphics  grDevices utils     datasets  methods   base     
  
  other attached packages:
  [1] biclust_1.2.0    lattice_0.20-35  colorspace_1.3-2 MASS_7.3-47     
  
  loaded via a namespace (and not attached):
   [1] flexclust_1.3-4   Rcpp_0.12.13      digest_0.6.12     rprojroot_1.2     jsonlite_1.5      backports_1.1.1  
   [7] stats4_3.4.2      magrittr_1.5      evaluate_0.10.1   stringi_1.1.5     rpart_4.1-11      rmarkdown_1.7    
  [13] flexdashboard_0.5 tools_3.4.2       stringr_1.2.0     parallel_3.4.2    yaml_2.1.14       compiler_3.4.2   
  [19] htmltools_0.3.6   knitr_1.17        modeltools_0.2-21
  </code></pre>
  
  <p>Has anyone an Idea what I could try to solve that? </p>
  
  <p><strong>EDIT:</strong></p>
  
  <p>Maybe this Info can help to find the reason of the Error:<br>
  When trying a copy of the "Diamond Explorer" example  <a href="https://jjallaire.shinyapps.io/shiny-ggplot2-diamonds/" rel="noreferrer">https://jjallaire.shinyapps.io/shiny-ggplot2-diamonds/</a> the result is that:</p>
  
  <p><a href="https://i.stack.imgur.com/auMuk.png" rel="noreferrer">screenshot of my Diamond Explorer copy - result</a> </p>
  
  <p>and I can see that error Messages in RStudio:</p>
  
  <pre><code>Output created:  
  C:/Users/xxx/AppData/Local/Temp/RtmpMdOsLH/file1ce033bb6c82.html
  Warnung: Error in sample.int: Objekt 'input' nicht gefunden
  Stack trace (innermost first):
  120: sample.int
  119: sample
  118: lapply
  117: map
  116: [.tbl_df
  115: [ [&lt;text&gt;#2]
  114: &lt;reactive:dataset&gt; [&lt;text&gt;#2]
  103: dataset
  102: ggplot [&lt;text&gt;#6]
  101: renderPlot [&lt;text&gt;#6]
   91: &lt;reactive:plotObj&gt;
   80: plotObj
   79: origRenderFunc
   78: output$outcca1a5b38b4e8b1a
    3: &lt;Anonymous&gt;
    2: do.call
    1: rmarkdown::run
  </code></pre>