XZHENDONG

Thanks for your help! It stops at the e = bytes(process.read(2, 65000, 0)) of the read_out() method, and keep going, I will finally trace to the _site-packages\win32com\client\__init__.py_.It stops at DispatchBaseClass._ApplyTypes_()...

I've tried not to use ProcessCreateFlag.wait_for_std_err.it would stop at o = bytes(process.read(1, 65000, 0)).Looks like the same problem.It seems that I can only try to use the vboxapi directly.Thanks