title: Error in readChar(con, 5L, useBytes = TRUE) : cannot open the connection
body: <p>The '<code>mow.R</code>' now contains:</p>
  
  <pre><code>library(RgoogleMaps);
  png(filename="RgoogleMaps-package_%03d_med.png", width=480, height=480);
  
  MyMap &lt;- GetMap(markers='&amp;40.702147,-74.015794,blues%7C40.711614,-74.012318,greeng%7C40.718217,-73.998284,redc', destfile="MyTile1.png");
  </code></pre>
  
  <p>This results in the following new error:</p>
  
  <pre><code>&gt; source('mow.R')
  [1] "Note that when center and zoom are not specified, no meta information on the map tile can be stored. This basically means that R cannot compute proper coordinates. You can still download the map tile and view it in R but overlays are not possible. Do you want to proceed ? (y/n)"
  y
  [1] "&amp;40.702147,-74.015794,blues%7C40.711614,-74.012318,greeng%7C40.718217,-73.998284,redc"
  [1] "http://maps.google.com/maps/api/staticmap?size=640x640&amp;maptype=terrain&amp;format=png32&amp;sensor=true&amp;40.702147,-74.015794,blues%7C40.711614,-74.012318,greeng%7C40.718217,-73.998284,redc"
  
  Error in readChar(con, 5L, useBytes = TRUE) : cannot open the connection
  In addition: Warning message:
  In readChar(con, 5L, useBytes = TRUE) :
    cannot open compressed file 'MyTile1.png.rda', probable reason 'No such file or directory'
  &gt; 
  </code></pre>
  
  <p>What's the way to correct this error?</p>
  
  <p><strong>R version 2.15.1</strong><br>
  <strong>RgoogleMaps version 1.2.0</strong></p>
  
  <hr>
  
  <pre><code>&gt; sessionInfo() 
  R version 2.15.1 (2012-06-22)
  Platform: x86_64-unknown-linux-gnu (64-bit)
  
  locale:
   [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
   [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
   [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
   [7] LC_PAPER=C                 LC_NAME=C                 
   [9] LC_ADDRESS=C               LC_TELEPHONE=C            
  [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       
  
  attached base packages:
  [1] stats     graphics  grDevices utils     datasets  methods   base     
  
  other attached packages:
  [1] RgoogleMaps_1.2.0 png_0.1-4        
  &gt; 
  </code></pre>