title: OpenCV classifier file Parsing error
body: <p>I am receiving the following error: </p>
  
  <pre><code>OpenCV Error: Parsing error (haarcascade_upperbody.xml(2): Name should start with a letter or underscore) in icvXMLParseTag, file /build/buildd/opencv-2.4.8+dfsg1/modules/core/src/persistence.cpp, line 2140
  Exception in thread "main" java.lang.reflect.InvocationTargetException
      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.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
      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.run(RunJar.java:221)
      at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
  Caused by: java.lang.RuntimeException: /build/buildd/opencv-2.4.8+dfsg1/modules/core/src/persistence.cpp:2140: error: (-212) upperbody(2): Name should start with a letter or underscore in function icvXMLParseTag
  
      at com.googlecode.javacv.cpp.opencv_core.cvLoad(Native Method)
      at com.googlecode.javacv.cpp.opencv_core.cvLoad(opencv_core.java:4589)
  </code></pre>
  
  <p>This is a java project. This error happens in line:</p>
  
  <pre><code>CvHaarClassifierCascade classifier = new CvHaarClassifierCascade(
                  cvLoad("haarcascade_upperbody.xml"));
  </code></pre>
  
  <p>I checked the file and there is nothing violating the "letter or _ rule".</p>