Traceback (most recent call last):
  File "./compare.py", line 7, in <module>
    from register_virtual_stack import Register_Virtual_Stack_MT
java.lang.NoClassDefFoundError: mpicbg/models/CoordinateTransform
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:270)
	at org.python.core.Py.loadAndInitClass(Py.java:895)
	at org.python.core.Py.findClassInternal(Py.java:830)
	at org.python.core.Py.findClassEx(Py.java:881)
	at org.python.core.packagecache.SysPackageManager.findClass(SysPackageManager.java:133)
	at org.python.core.packagecache.PackageManager.findClass(PackageManager.java:28)
	at org.python.core.packagecache.SysPackageManager.findClass(SysPackageManager.java:122)
	at org.python.core.PyJavaPackage.__findattr_ex__(PyJavaPackage.java:137)
	at org.python.core.PyObject.__findattr__(PyObject.java:863)
	at org.python.core.imp.import_name(imp.java:849)
	at org.python.core.imp.importName(imp.java:884)
	at org.python.core.ImportFunction.__call__(__builtin__.java:1220)
	at org.python.core.PyObject.__call__(PyObject.java:357)
	at org.python.core.__builtin__.__import__(__builtin__.java:1173)
	at org.python.core.imp.importFromAs(imp.java:978)
	at org.python.core.imp.importFrom(imp.java:954)
	at org.python.pycode._pyx0.f$0(./compare.py:48)
	at org.python.pycode._pyx0.call_function(./compare.py)
	at org.python.core.PyTableCode.call(PyTableCode.java:165)
	at org.python.core.PyCode.call(PyCode.java:18)
	at org.python.core.Py.runCode(Py.java:1261)
	at org.python.util.PythonInterpreter.execfile(PythonInterpreter.java:235)
	at org.python.util.jython.run(jython.java:247)
	at org.python.util.jython.main(jython.java:129)
Caused by: java.lang.ClassNotFoundException: mpicbg.models.CoordinateTransform
	at org.python.core.SyspathJavaLoader.findClass(SyspathJavaLoader.java:127)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	... 25 more

java.lang.NoClassDefFoundError: java.lang.NoClassDefFoundError: mpicbg/models/CoordinateTransform