通过conda安装R内核后，尝试启动内核时出现以下错误。错误说文件丢失，但我无法弄清楚它所指的是什么文件。知道究竟是什么引起了错误吗？
Traceback (most recent call last):
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/web.py", line 1445, in _execute
result = yield result
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/gen.py", line 1008, in run
value = future.result()
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/concurrent.py", line 232, in result
raise_exc_info(self._exc_info)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/gen.py", line 1014, in run
yielded = self.gen.throw(*exc_info)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/notebook/services/sessions/handlers.py", line 73, in post
type=mtype))
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/gen.py", line 1008, in run
value = future.result()
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/concurrent.py", line 232, in result
raise_exc_info(self._exc_info)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/gen.py", line 1014, in run
yielded = self.gen.throw(*exc_info)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/notebook/services/sessions/sessionmanager.py", line 79, in create_session
kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/gen.py", line 1008, in run
value = future.result()
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/concurrent.py", line 232, in result
raise_exc_info(self._exc_info)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/gen.py", line 1014, in run
yielded = self.gen.throw(*exc_info)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/notebook/services/sessions/sessionmanager.py", line 92, in start_kernel_for_session
self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/gen.py", line 1008, in run
value = future.result()
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/concurrent.py", line 232, in result
raise_exc_info(self._exc_info)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/tornado/gen.py", line 282, in wrapper
yielded = next(result)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/notebook/services/kernels/kernelmanager.py", line 141, in start_kernel
super(MappingKernelManager, self).start_kernel(**kwargs)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/jupyter_client/multikernelmanager.py", line 109, in start_kernel
km.start_kernel(**kwargs)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/jupyter_client/manager.py", line 244, in start_kernel
**kw)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/jupyter_client/manager.py", line 190, in _launch_kernel
return launch_kernel(kernel_cmd, **kw)
File "/home/Jupyter/anaconda2/lib/python2.7/site-packages/jupyter_client/launcher.py", line 123, in launch_kernel
proc = Popen(cmd, **kwargs)
File "/home/Jupyter/anaconda2/lib/python2.7/subprocess.py", line 390, in __init__
errread, errwrite)
File "/home/Jupyter/anaconda2/lib/python2.7/subprocess.py", line 1025, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory