Fem conflict with h5py?

[arthurx70]

I tried to compile the 0.20 src code, run the FreeCAD.exe, after type in "import Fem" in python console, then type in "import h5py" in python console
`

import Fem
import h5py
Traceback (most recent call last):
File "", line 1, in
File "H:\workspace\CAD\FreeCAD-master\Freecad_build\bin\Lib\site-packages\shiboken2\files.dir\shibokensupport_feature_.py", line 142, in import
return original_import(name, *args, **kwargs)
File "H:\workspace\CAD\FreeCAD-master\Freecad_build\bin\lib\site-packages\h5py_init.py", line 33, in
from . import version
File "H:\workspace\CAD\FreeCAD-master\Freecad_build\bin\Lib\site-packages\shiboken2\files.dir\shibokensupport_feature_.py", line 142, in _import
return original_import(name, *args, **kwargs)
File "H:\workspace\CAD\FreeCAD-master\Freecad_build\bin\lib\site-packages\h5py\version.py", line 15, in
from . import h5 as h5
File "H:\workspace\CAD\FreeCAD-master\Freecad_build\bin\Lib\site-packages\shiboken2\files.dir\shibokensupport_feature.py", line 142, in import
return original_import(name, *args, **kwargs)
File "h5py\h5.pyx", line 1, in init h5py.h5
File "H:\workspace\CAD\FreeCAD-master\Freecad_build\bin\Lib\site-packages\shiboken2\files.dir\shibokensupport_feature.py", line 142, in _import
return original_import(name, *args, **kwargs)
ImportError: DLL load failed while importing defs: Can not find the specified program`

after type in "import h5py" in python console, then type in "import Fem" in python console
`

import h5py
import Fem
Traceback (most recent call last):
File "", line 1, in
File "H:\workspace\CAD\FreeCAD-master\Freecad_build\bin\Lib\site-packages\shiboken2\files.dir\shibokensupport_feature_.py", line 142, in _import
return original_import(name, *args, **kwargs)
ImportError: DLL load failed while importing Fem: Can not find the specified program`

why?
how to fix it?