Problem of "SystemError: NULL result without error in PyObject_Call"

[yfjia666]

There is a problem when I use the gemV following the readme.
After compiling gem5, I type the command line as:
build/ARM/gem5.opt configs/example/se.py --cpu-type=arm_detailed --caches --vul_analysis=yes --cmd=tests/test-progs/hello/bin/ARM/linux/hello
The terminal output prints:

  Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/***/gemV/gemV/src/python/m5/main.py", line 388, in main
    exec filecode in scope
  File "configs/example/se.py", line 298, in <module>
    Simulation.run(options, root, system, FutureClass)
  File "/***/gemV/gemV/configs/common/Simulation.py", line 419, in run
    m5.instantiate(checkpoint_dir)
  File "/***/gemV/gemV/src/python/m5/simulate.py", line 112, in instantiate
    for obj in root.descendants(): obj.createCCObject()
  File "/***/gemV/gemV/src/python/m5/SimObject.py", line 1066, in createCCObject
    yield self
  File "/***/gemV/gemV/src/python/m5/SimObject.py", line 1025, in getCCParams
    if isinstance(self._params[param], VectorParamDesc):
SystemError: NULL result without error in PyObject_Call 

Please help me solve this problem, thanks！