Error message using sDNA Prepare Network

I’m preparing a road network using the sDNA Prepare Network tool on QGIS 2.18.28. My OS is Windows 10 64 bit.

I get the following error message:

Algorithm Prepare Network starting...
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WARNING: sDNA ignores your selection and will process the entire layer
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Running external command: "D:Program FilesQGIS 2.18binpython.exe" "c:Program Files (x86)sDNAbinsdnaprepare.py" --im "net=D:/MEGAsync/lbm/nanjing_roads_project.shp" --om "net=D:/MEGAsync/lbm/qgis/sdna/nj_prepare.shp;errors=D:/MEGAsync/lbm/qgis/sdna/nj_prepare.shp" "start_gs=;end_gs=;xytol=;ztol=;action=REPAIR;nearmisses;duplicates;isolated;splitlinks;island=;data_absolute=;data_unitlength=;data_text="

sDNA sdnaprepare config: start_gs=;end_gs=;xytol=;ztol=;action=REPAIR;nearmisses;duplicates;isolated;splitlinks;island=;data_absolute=;data_unitlength=;data_text=
Loading DLL c:Program Files (x86)sDNAx64sdna_vs2008.dll
ERR: Traceback (most recent call last):
ERR:   File "c:Program Files (x86)sDNAbinsdnaprepare.py", line 4, in <module>
ERR:     commandline_integral_prepare("sdnaprepare")
ERR:   File "c:Program Files (x86)sDNAcommandline_integral_prepare.py", line 103, in commandline_integral_prepare
ERR:     dll = options.dll)
ERR:   File "c:Program Files (x86)sDNAruncalculation.py", line 58, in runcalculation
ERR:     tablecollection1d = TableCollection()
ERR:   File "c:Program Files (x86)sDNAsdnapy.py", line 215, in __init__
ERR:     self.dll=_dll()
ERR:   File "c:Program Files (x86)sDNAsdnapy.py", line 38, in _dll
ERR:     __initialize_dll()
ERR:   File "c:Program Files (x86)sDNAsdnapy.py", line 74, in __initialize_dll
ERR:     __dll_instance = windll.LoadLibrary(str(__sdna_dll_path))
ERR:   File "D:Program FilesQGIS 2.18appspython27Libctypes__init__.py", line 444, in LoadLibrary
ERR:     return self._dlltype(name)
ERR:   File "D:Program FilesQGIS 2.18appspython27Libctypes__init__.py", line 366, in __init__
ERR:     self._handle = _dlopen(self._name, mode)
ERR: WindowsError: [Error 14001] Ó¦ÓóÌÐòÎÞ·¨Æô¶¯£¬ÒòΪӦÓóÌÐòµÄ²¢ÐÐÅäÖò»ÕýÈ·¡£ÓйØÏêϸÐÅÏ¢£¬Çë²ÎÔÄÓ¦ÓóÌÐòʼþÈÕÖ¾£¬»òʹÓÃÃüÁîÐÐ sxstrace.exe
External command completed
ERROR: PROCESS DID NOT COMPLETE SUCCESSFULLY
Converting outputs
Loading resulting layers
Algorithm Prepare Network finished