title: closing unused RODBC handle
body: <p>I have been receiving a Warning Message: </p>
  
  <pre><code>`historicalHourly &lt;- importHistoricalHourly(startDatePast,endDatePast,Markets,location)
  [1] "Importing Hourly Data"
  [1] "Flag - Moving from importHistoricalHourly to CleaningUpHourly"
  [1] "Flag - Moving to importHistoricalDaily from CleaningUpHourly"Warning messages:
  
  1: closing unused RODBC handle 41 
  2: closing unused RODBC handle 40 
  3: closing unused RODBC handle 36` 
  </code></pre>
  
  <p>In the function, everything checks out as far as return values, print statements.
  I have an idea that it is definitely a warning due to this function:</p>
  
  <p><code>hHourly.df &lt;- retrievelim(PowerCodeID,columns,startDatePast,endDatePast,unitstr="Hours")</code></p>
  
  <p>which is accessing a separate database in another program.  This function is returning a dataframe of dateTime Values by the hour with different numeric values in the next column</p>
  
  <p>If anyone could give me an idea about why it is closing the database and what is happening, I would greatly appreciate it.</p>