title: x range is invalid GNUplot time and date
body: <p>I am trying to plot data that I get from dataloggers, and I am not sure why I get an xrange is invalid error. </p>
  
  <p>Below is my minimal script and a sample of the data I am trying to plot. They all have similar headers which i thought was the problem, but I tried #commenting them out or deleting them and that didn't work. If the solution could include a way for me to do this without messing with the headers, that would be great and save me a lot of time.</p>
  
  <p>I've changed the headers to just the letter A for data protection, it gives the same error.</p>
  
  <p>Min Code</p>
  
  <pre><code>    #!/gnuplot
  
  set datafile sep ','
  set xdata time
  set timefmt '%d/%m/%Y,%H:%M:%S'
  
  
  
  #DATA FILES
  plot 'PAS.csv'   using 2:4 title 'Passive'  with points pt 5 lc rgb 'red'   axes x1y1,\
       'ACT.csv'   using 2:4 title 'Active'   with points pt 5 lc rgb 'blue'  axes x1y1,\
       'RISK.csv'  using 2:4 title 'Risk'     with points pt 5 lc rgb 'black' axes x1y2
  </code></pre>
  
  <p>DATA</p>
  
  <pre><code>AAAAAAAAA   
  AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
  
  Timestamp,Date,Time,Value,Units  
  1415879007,13/11/2014,11:43:27,0.011,µA 
  1415878407,13/11/2014,11:33:27,0.045,µA 
  1415877807,13/11/2014,11:23:27,0.003,µA
  1415877207,13/11/2014,11:13:27,0.056,µA
  1415876607,13/11/2014,11:03:27,-0.036,µA
  1415876007,13/11/2014,10:53:27,-0.046,µA 
  1415875407,13/11/2014,10:43:27,-0.039,µA 
  1415874807,13/11/2014,10:33:27,-0.050,µA 
  1415874207,13/11/2014,10:23:27,0.051,µA 
  1415873607,13/11/2014,10:13:27,-0.014,µA 
  1415873007,13/11/2014,10:03:27,0.035,µA 
  1415872407,13/11/2014,09:53:27,0.054,µA 
  1415871807,13/11/2014,09:43:27,-0.006,µA 
  1415871207,13/11/2014,09:33:27,-0.049,µA 
  1415870607,13/11/2014,09:23:27,0.000,µA 
  1415870007,13/11/2014,09:13:27,0.048,µA 
  1415869407,13/11/2014,09:03:27,-0.029,µA
  </code></pre>
  
  <p>Thank you!</p>