Running 'runRUnitTests.R'
  Running 'test.humanReadable.R'
  Comparing 'test.humanReadable.Rout' to 'test.humanReadable.Rout.save' ...4,13c4
< gdata: Unable to locate valid perl interpreter
< gdata: 
< gdata: read.xls() will be unable to read Excel XLS and XLSX files
< gdata: unless the 'perl=' argument is used to specify the location of a
< gdata: valid perl intrpreter.
< gdata: 
< gdata: (To avoid display of this message in the future, please ensure
< gdata: perl is installed and available on the executable search path.)
< gdata: Unable to load perl libaries needed by read.xls()
< gdata: to support 'XLX' (Excel 97-2004) files.
---
> gdata: read.xls support for 'XLS' (Excel 97-2004) files ENABLED.
15,20c6
< gdata: Unable to load perl libaries needed by read.xls()
< gdata: to support 'XLSX' (Excel 2007+) files.
< 
< gdata: Run the function 'installXLSXsupport()'
< gdata: to automatically download and install the perl
< gdata: libaries needed to support Excel XLS and XLSX formats.
---
> gdata: read.xls support for 'XLSX' (Excel 2007+) files ENABLED.
  Running 'test.read.xls.R'
Running the tests in 'tests/test.read.xls.R' failed.
Complete output:
  > library(gdata)
  gdata: Unable to locate valid perl interpreter
  gdata: 
  gdata: read.xls() will be unable to read Excel XLS and XLSX files
  gdata: unless the 'perl=' argument is used to specify the location of a
  gdata: valid perl intrpreter.
  gdata: 
  gdata: (To avoid display of this message in the future, please ensure
  gdata: perl is installed and available on the executable search path.)
  gdata: Unable to load perl libaries needed by read.xls()
  gdata: to support 'XLX' (Excel 97-2004) files.
  
  gdata: Unable to load perl libaries needed by read.xls()
  gdata: to support 'XLSX' (Excel 2007+) files.
  
  gdata: Run the function 'installXLSXsupport()'
  gdata: to automatically download and install the perl
  gdata: libaries needed to support Excel XLS and XLSX formats.
  
  Attaching package: 'gdata'
  
  The following object is masked from 'package:stats':
  
      nobs
  
  The following object is masked from 'package:utils':
  
      object.size
  
  The following object is masked from 'package:base':
  
      startsWith
  
  > 
  > if ( ! 'XLSX' %in% xlsFormats() )
  +   {
  +     try( installXLSXsupport() )
  +   }
  Error in findPerl(verbose = verbose) : 
    perl executable not found. Use perl= argument to specify the correct path.
  Calls: %in% -> xlsFormats -> findPerl
  Execution halted