Hi All, I am trying do a pip install of pythonnet. I get the following build errors. Any suggestions on how to fix it? (base) C:\Users\ploc>pip install pythonnet Collecting pythonnet Using cached https://files.pythonhosted.org/packages/89/3b/a22cd45b591d6cf490e e8b24d52b9db1f30b4b478b64a9b231c53474731e/pythonnet-2.3.0.tar.gz Building wheels for collected packages: pythonnet Running setup.py bdist_wheel for pythonnet ... error Complete output from command c:\users\ploc\appdata\local\continuum\anaconda3\p ython.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\ploc\\AppData\ \Local\\Temp\\pip-install-r86ym617\\pythonnet\\setup.py';f=getattr(tokenize, 'op en', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile( code, __file__, 'exec'))" bdist_wheel -d C:\Users\ploc\AppData\Local\Temp\pip-wh eel-9cgf0yo2 --python-tag cp37: running bdist_wheel running build running build_ext Checking for updates from https://www.nuget.org/api/v2/. Currently running NuGet.exe 3.5.0. Updating NuGet.exe to 4.7.1. Update successful. MSBuild auto-detection: using msbuild version '15.6.82.30579' from 'C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\bin'. Restoring NuGet package NUnit.3.6.0. Restoring NuGet package UnmanagedExports.1.2.7. Restoring NuGet package NUnit.ConsoleRunner.3.6.0. Adding package 'NUnit.ConsoleRunner.3.6.0' to folder 'C:\Users\ploc\AppData\Lo cal\Temp\pip-install-r86ym617\pythonnet\packages' Adding package 'NUnit.3.6.0' to folder 'C:\Users\ploc\AppData\Local\Temp\pip-i nstall-r86ym617\pythonnet\packages' Adding package 'UnmanagedExports.1.2.7' to folder 'C:\Users\ploc\AppData\Local \Temp\pip-install-r86ym617\pythonnet\packages' Added package 'UnmanagedExports.1.2.7' to folder 'C:\Users\ploc\AppData\Local\ Temp\pip-install-r86ym617\pythonnet\packages' Added package 'NUnit.ConsoleRunner.3.6.0' to folder 'C:\Users\ploc\AppData\Loc al\Temp\pip-install-r86ym617\pythonnet\packages' Added package 'NUnit.3.6.0' to folder 'C:\Users\ploc\AppData\Local\Temp\pip-in stall-r86ym617\pythonnet\packages' NuGet Config files used: C:\Users\ploc\AppData\Roaming\NuGet\NuGet.Config C:\Program Files (x86)\NuGet\Config\Microsoft.VisualStudio.Offline.config Feeds used: C:\Users\ploc\.nuget\packages\ https://www.nuget.org/api/v2/ http://nuget.grapecity.com/nuget C:\Program Files (x86)\Microsoft SDKs\NuGetPackages\ Installed: 3 package(s) to packages.config projects Traceback (most recent call last): File "tools\geninterop\geninterop.py", line 292, in <module> sys.exit(main()) File "tools\geninterop\geninterop.py", line 272, in main python_h = preprocess_python_headers() File "tools\geninterop\geninterop.py", line 192, in preprocess_python_header s for line in _check_output(cmd).splitlines(): File "tools\geninterop\geninterop.py", line 41, in _check_output output = subprocess.check_output(*args, **kwargs) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\subprocess.py", li ne 376, in check_output **kwargs).stdout File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\subprocess.py", li ne 453, in run with Popen(*popenargs, **kwargs) as process: File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\subprocess.py", li ne 756, in __init__ restore_signals, start_new_session) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\subprocess.py", li ne 1155, in _execute_child startupinfo) FileNotFoundError: [WinError 2] The system cannot find the file specified Traceback (most recent call last): File "<string>", line 1, in <module> File "C:\Users\ploc\AppData\Local\Temp\pip-install-r86ym617\pythonnet\setup. py", line 405, in <module> zip_safe=False, File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\site-packages\setu ptools\__init__.py", line 140, in setup return distutils.core.setup(**attrs) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\core.py" , line 148, in setup dist.run_commands() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\dist.py" , line 966, in run_commands self.run_command(cmd) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\dist.py" , line 985, in run_command cmd_obj.run() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\site-packages\whee l\bdist_wheel.py", line 188, in run self.run_command('build') File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\cmd.py", line 313, in run_command self.distribution.run_command(command) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\dist.py" , line 985, in run_command cmd_obj.run() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\command\ build.py", line 135, in run self.run_command(cmd_name) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\cmd.py", line 313, in run_command self.distribution.run_command(command) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\dist.py" , line 985, in run_command cmd_obj.run() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\command\ build_ext.py", line 339, in run self.build_extensions() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\command\ build_ext.py", line 448, in build_extensions self._build_extensions_serial() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\command\ build_ext.py", line 473, in _build_extensions_serial self.build_extension(ext) File "C:\Users\ploc\AppData\Local\Temp\pip-install-r86ym617\pythonnet\setup. py", line 191, in build_extension subprocess.check_call([sys.executable, geninterop, interop_file]) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\subprocess.py", li ne 328, in check_call raise CalledProcessError(retcode, cmd) subprocess.CalledProcessError: Command '['c:\\users\\ploc\\appdata\\local\\con tinuum\\anaconda3\\python.exe', 'tools\\geninterop\\geninterop.py', 'src\\runtim e\\interop37.cs']' returned non-zero exit status 1. ---------------------------------------- Failed building wheel for pythonnet Running setup.py clean for pythonnet Failed to build pythonnet Installing collected packages: pythonnet Running setup.py install for pythonnet ... error Complete output from command c:\users\ploc\appdata\local\continuum\anaconda3 \python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\ploc\\AppDat a\\Local\\Temp\\pip-install-r86ym617\\pythonnet\\setup.py';f=getattr(tokenize, ' open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compil e(code, __file__, 'exec'))" install --record C:\Users\ploc\AppData\Local\Temp\pi p-record-qmhk9uw7\install-record.txt --single-version-externally-managed --compi le: running install running build running build_ext Checking for updates from https://www.nuget.org/api/v2/. Currently running NuGet.exe 4.7.1. NuGet.exe is up to date. MSBuild auto-detection: using msbuild version '15.6.82.30579' from 'C:\Progr am Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\15.0\bin'. All packages listed in packages.config are already installed. Traceback (most recent call last): File "tools\geninterop\geninterop.py", line 292, in <module> sys.exit(main()) File "tools\geninterop\geninterop.py", line 272, in main python_h = preprocess_python_headers() File "tools\geninterop\geninterop.py", line 192, in preprocess_python_head ers for line in _check_output(cmd).splitlines(): File "tools\geninterop\geninterop.py", line 41, in _check_output output = subprocess.check_output(*args, **kwargs) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\subprocess.py", line 376, in check_output **kwargs).stdout File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\subprocess.py", line 453, in run with Popen(*popenargs, **kwargs) as process: File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\subprocess.py", line 756, in __init__ restore_signals, start_new_session) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\subprocess.py", line 1155, in _execute_child startupinfo) FileNotFoundError: [WinError 2] The system cannot find the file specified Traceback (most recent call last): File "<string>", line 1, in <module> File "C:\Users\ploc\AppData\Local\Temp\pip-install-r86ym617\pythonnet\setu p.py", line 405, in <module> zip_safe=False, File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\site-packages\se tuptools\__init__.py", line 140, in setup return distutils.core.setup(**attrs) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\core.p y", line 148, in setup dist.run_commands() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\dist.p y", line 966, in run_commands self.run_command(cmd) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\dist.p y", line 985, in run_command cmd_obj.run() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\site-packages\se tuptools\command\install.py", line 61, in run return orig.install.run(self) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\comman d\install.py", line 545, in run self.run_command('build') File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\cmd.py ", line 313, in run_command self.distribution.run_command(command) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\dist.p y", line 985, in run_command cmd_obj.run() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\comman d\build.py", line 135, in run self.run_command(cmd_name) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\cmd.py ", line 313, in run_command self.distribution.run_command(command) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\dist.p y", line 985, in run_command cmd_obj.run() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\comman d\build_ext.py", line 339, in run self.build_extensions() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\comman d\build_ext.py", line 448, in build_extensions self._build_extensions_serial() File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\distutils\comman d\build_ext.py", line 473, in _build_extensions_serial self.build_extension(ext) File "C:\Users\ploc\AppData\Local\Temp\pip-install-r86ym617\pythonnet\setu p.py", line 191, in build_extension subprocess.check_call([sys.executable, geninterop, interop_file]) File "c:\users\ploc\appdata\local\continuum\anaconda3\lib\subprocess.py", line 328, in check_call raise CalledProcessError(retcode, cmd) subprocess.CalledProcessError: Command '['c:\\users\\ploc\\appdata\\local\\c ontinuum\\anaconda3\\python.exe', 'tools\\geninterop\\geninterop.py', 'src\\runt ime\\interop37.cs']' returned non-zero exit status 1. ---------------------------------------- Command "c:\users\ploc\appdata\local\continuum\anaconda3\python.exe -u -c "impor t setuptools, tokenize;__file__='C:\\Users\\ploc\\AppData\\Local\\Temp\\pip-inst all-r86ym617\\pythonnet\\setup.py';f=getattr(tokenize, 'open', open)(__file__);c ode=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec' ))" install --record C:\Users\ploc\AppData\Local\Temp\pip-record-qmhk9uw7\instal l-record.txt --single-version-externally-managed --compile" failed with error co de 1 in C:\Users\ploc\AppData\Local\Temp\pip-install-r86ym617\pythonnet\ Thanks, Phat