title: S3DistCp job failure: -- dest doesn't match
body: <p>I am trying to use s3DistCp to combine some small files in 1 S3 folder to another S3 folder.  Script is something like the following:</p>
  
  <pre><code>elastic-mapreduce --jobflow j-33EDUGSQCN0PZ --jar \
  /home/hadoop/lib/emr-s3distcp-1.0.jar \
  --args '--src,s3://li-test/data, \
  --dest,s3://li-test/result, \
  --groupBy,[0-9]*,\
  --targetSize,128'
  </code></pre>
  
  <p>But I am getting java.lang.RuntimeException error as following.  Help is needed.  Thanks!</p>
  
  <p>Exception in thread "main" java.lang.RuntimeException: Argument  \
  --dest doesn't match.
  at emr.hbase.options.Options.parseArguments(Options.java:75)
  at emr.hbase.options.Options.parseArguments(Options.java:57)
  at com.amazon.elasticmapreduce.s3distcp.S3DistCp$S3DistCpOptions.<br>
  (S3DistCp.java:124)
  at com.amazon.elasticmapreduce.s3distcp.S3DistCp.run(S3DistCp.java:545)
  at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
  at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
  at com.amazon.elasticmapreduce.s3distcp.Main.main(Main.java:13)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
  at 
  sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:606)
  at org.apache.hadoop.util.RunJar.main(RunJar.java:187)</p>