cannot open input file 'sapnwrfc.lib'

[Suncatcher]

I get this error when trying to install through PIP in Python 3.8.1

pip3 install pynwrfc --no-binary :all:

C:\Users\user12>pip3 install pynwrfc --no-binary :all:
Collecting pynwrfc
Using cached pynwrfc-2.0.5.tar.gz (236 kB)
Requirement already satisfied: setuptools in c:\users\user12\appdata\local\programs\python\python38\lib\site-packages (from pynwrfc) (41.2.0)
Skipping wheel build for pynwrfc, due to binaries being disabled for it.
Installing collected packages: pynwrfc
Running setup.py install for pynwrfc ... error
ERROR: Command errored out with exit status 1:
command: 'c:\users\user12\appdata\local\programs\python\python38\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\Users\user12\AppData\Local\Temp\pip-install-c3he8gtb\pynwrfc\setup.py'"'"'; file='"'"'C:\Users\user12\AppData\Local\Temp\pip-install-c3he8gtb\pynwrfc\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(file);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' install --record 'C:\Users\user12\AppData\Local\Temp\pip-record-1z77e75n\install-record.txt' --single-version-externally-managed --compile --install-headers 'c:\users\user12\appdata\local\programs\python\python38\Include\pynwrfc'
cwd: C:\Users\user12\AppData\Local\Temp\pip-install-c3he8gtb\pynwrfc
Complete output (25 lines):
FINDSTR: Cannot open c:\nwrfcsdk\lib\sapnwrfc.dll
running install
running build
running build_py
creating build
creating build\lib.win-amd64-3.8
creating build\lib.win-amd64-3.8\pyrfc
copying src\pyrfc_exception.py -> build\lib.win-amd64-3.8\pyrfc
copying src\pyrfc_init_.py -> build\lib.win-amd64-3.8\pyrfc
running build_ext
building 'pyrfc.pyrfc' extension
creating build\temp.win-amd64-3.8
creating build\temp.win-amd64-3.8\Release
creating build\temp.win-amd64-3.8\Release\src
creating build\temp.win-amd64-3.8\Release\src\pyrfc
C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.25.28610\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -DSAPonNT -D_CRT_NON_CONFORMING_SWPRINTFS -D_CRT_SECURE_NO_DEPRECATES -D_CRT_NONSTDC_NO_DEPRECATE -D_AFXDLL -DWIN32 -D_WIN32_WINNT=0x0502 -DWIN64 -D_AMD64_ -DNDEBUG -DSAPwithUNICODE -DUNICODE -D_UNICODE -DSAPwithTHREADS -D_ATL_ALLOW_CHAR_UNSIGNED -D_LARGEFILE_SOURCE -D_CONSOLE -DSAP_PLATFORM_MAKENAME=ntintel -Ic:\users\user12\appdata\local\programs\python\python38\include -Ic:\users\user12\appdata\local\programs\python\python38\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.25.28610\include" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.18362.0\cppwinrt" /EHsc /Tpsrc/pyrfc/_pyrfc.cpp /Fobuild\temp.win-amd64-3.8\Release\src/pyrfc/_pyrfc.obj -Ic:\nwrfcsdk\include -Ic:\users\user12\appdata\local\programs\python\python38\lib\inspect.py\Include -Ic:\users\user12\appdata\local\programs\python\python38\lib\inspect.py\Include\PC -EHs -Gy -J -MD -nologo -W3 -Z7 -GL -O2 -Oy- /we4552 /we4700 /we4789
_pyrfc.cpp
src/pyrfc/_pyrfc.cpp(16678): warning C4244: '=': conversion from 'Py_ssize_t' to 'unsigned int', possible loss of data
src/pyrfc/_pyrfc.cpp(29611): warning C4311: 'type cast': pointer truncation from 'RFC_THROUGHPUT_HANDLE' to 'unsigned long'
src/pyrfc/_pyrfc.cpp(29611): warning C4302: 'type cast': truncation from 'RFC_THROUGHPUT_HANDLE' to 'unsigned long'
src/pyrfc/_pyrfc.cpp(29944): warning C4311: 'type cast': pointer truncation from 'RFC_THROUGHPUT_HANDLE' to 'unsigned long'
src/pyrfc/_pyrfc.cpp(29944): warning C4302: 'type cast': truncation from 'RFC_THROUGHPUT_HANDLE' to 'unsigned long'
C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.25.28610\bin\HostX86\x64\link.exe /nologo /INCREMENTAL:NO /LTCG /DLL /MANIFEST:EMBED,ID=2 /MANIFESTUAC:NO /LIBPATH:c:\users\user12\appdata\local\programs\python\python38\libs /LIBPATH:c:\users\user12\appdata\local\programs\python\python38\PCbuild\amd64 "/LIBPATH:C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.25.28610\lib\x64" "/LIBPATH:C:\Program Files (x86)\Windows Kits\10\lib\10.0.18362.0\ucrt\x64" "/LIBPATH:C:\Program Files (x86)\Windows Kits\10\lib\10.0.18362.0\um\x64" sapnwrfc.lib libsapucum.lib /EXPORT:PyInit_pyrfc build\temp.win-amd64-3.8\Release\src/pyrfc/_pyrfc.obj /OUT:build\lib.win-amd64-3.8\pyrfc\pyrfc.cp38-win_amd64.pyd /IMPLIB:build\temp.win-amd64-3.8\Release\src/pyrfc\pyrfc.cp38-win_amd64.lib -LIBPATH:c:\nwrfcsdk\lib -LIBPATH:c:\users\user12\appdata\local\programs\python\python38\lib\inspect.py\PCbuild -NXCOMPAT -STACK:0x2000000 -SWAPRUN:NET -DEBUG -OPT:REF -DEBUGTYPE:CV,FIXUP -MACHINE:amd64 -nologo -LTCG
LINK : fatal error LNK1181: cannot open input file 'sapnwrfc.lib'
error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.25.28610\bin\HostX86\x64\link.exe' failed with exit status 1181
----------------------------------------
ERROR: Command errored out with exit status 1: 'c:\users\user12\appdata\local\programs\python\python38\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\Users\user12\AppData\Local\Temp\pip-install-c3he8gtb\pynwrfc\setup.py'"'"'; file='"'"'C:\Users\user12\AppData\Local\Temp\pip-install-c3he8gtb\pynwrfc\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(file);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' install --record 'C:\Users\user12\AppData\Local\Temp\pip-record-1z77e75n\install-record.txt' --single-version-externally-managed --compile --install-headers 'c:\users\user12\appdata\local\programs\python\python38\Include\pynwrfc' Check the logs for full command output.

C++ VS2019 build tools are installed. Paths are set

What's the matter?

[bsrdjan]

Could you please check:

1. Is sapnwrfc.lib present in %SAPNWRFC_HOME%\lib folder ? User has read authorisation ? If not, reinstall SAP NWRFC SDK.

2. If SAP NWRFC SDK for Windows 64 bit platform downloaded from SAP Service Portal and installed? Not for example 32 bit or for another platform?

3. cd to %SAPNWRFC_HOME%\bin folder and run rfcexec.exe. The SAP NWRFC SDK error message about arguments should be returned, not error like "DLL could not be found/loaded"

4. Clone the PyRFC repository and run the SAP NWRFC SDK version check, from the repo root. The result should be something like:

C:\src\PyRFC>ci\utils\nwrfcsdk-version.bat
750 Patch Level 6

C:\src\PyRFC>

[Suncatcher]

Is sapnwrfc.lib present in %SAPNWRFC_HOME%\lib folder ?

No, Just check another time and cannot find it

it is an official archive from launchpad.support.sap.com, sap note 2573790 where I found a link

what am I doing wrong?

2. 64-bit
3. No, it also throws "rfcexec is not recognized"

 C:\src\PyRFC>ci\utils\nwrfcsdk-version.bat

gives

FINDSTR: Cannot open c:\nwrfcsdk\lib\sapnwrfc.dll

[bsrdjan]

It looks like SAP NWRFC SDK for Linux platform is installed on your Windows system.

The dropdown combo just above the "File Type" on a last screenshot, shows AIX 64 bit.

To download Windows 64 bit, please select the Windows platform there. The previous screenshot shows SO libs, used on Linux, not working on Windows.

[Suncatcher]

Wow, so silly. Didn't know the binaries are different for OSes.
Thanks a ton, now it worked like a charm.

[mangesh108]

can't import connection from pyrfc

[amarvin]

Try from pyrfc import Connection, as Python is case sensitive.