Failure in installing pyrfc in windows

[raviteja-oops]

Hi, I'm trying to install pyrfc in windows - 10 VM x64 64-bit.

The pre-requisites I already installed i.e., visual studio and SAPNWRFC SDK. But while building pyrfc wheel I'm getting below error. Can you please help me on this to fix.

C:\PyRFC>python setup.py bdist_wheel 750 Patch Level 8 running bdist_wheel running build running build_py running build_ext skipping 'src/pyrfc_pyrfc.cpp' Cython extension (up-to-date) building 'pyrfc.pyrfc' extension C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30133\bin\HostX86\x86\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MT -DSAPonNT -D_CRT_NON_CONFORMING_SWPRINTFS -D_CRT_SECURE_NO_DEPRECATES -D_CRT_NONSTDC_NO_DEPRECATE -D_AFXDLL -DWIN32 -D_WIN32_WINNT=0x0502 -DWIN64 -DAMD64 -DNDEBUG -DSAPwithUNICODE -DUNICODE -D_UNICODE -DSAPwithTHREADS -D_ATL_ALLOW_CHAR_UNSIGNED -D_LARGEFILE_SOURCE -D_CONSOLE -DSAP_PLATFORM_MAKENAME=ntintel "-IC:\Program Files (x86)\Python37-32\include" "-IC:\Program Files (x86)\Python37-32\include" "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30133\include" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\cppwinrt" /EHsc /Tpsrc/pyrfc_pyrfc.cpp /Fobuild\temp.win32-3.7\Release\src/pyrfc_pyrfc.obj -IC:\nwrfcsdk\include -IC:\Python\Python37\Include -IC:\Python\Python37\Include\PC /EHs /Gy /J /MD /nologo /W3 /Z7 /GL /O2 /Oy- /we4552 /we4700 /we4789 cl : Command line warning D9025 : overriding '/MT' with '/MD' _pyrfc.cpp src/pyrfc_pyrfc.cpp(21148): error C2664: 'RFC_RC RfcInstallGenericServerFunction(RFC_SERVER_FUNCTION,RFC_FUNC_DESC_CALLBACK,RFC_ERROR_INFO )': cannot convert argument 1 from 'RFC_RC (__cdecl )(RFC_CONNECTION_HANDLE,RFC_FUNCTION_HANDLE,RFC_ERROR_INFO *)' to 'RFC_SERVER_FUNCTION' src/pyrfc_pyrfc.cpp(21148): note: None of the functions with this name in scope match the target type C:\nwrfcsdk\include\sapnwrfc.h(2266): note: see declaration of 'RfcInstallGenericServerFunction' src/pyrfc_pyrfc.cpp(29685): warning C4018: '<': signed/unsigned mismatch error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30133\bin\HostX86\x86\cl.exe' failed with exit status 2

[bsrdjan]

Which Python version and which pyrfc version are you using?

I could not reproduce with the current pyrfc and Python 3.7.6:

PS C:\src\test\pyrfc> python -V
Python 3.7.6
PS C:\src\test> git clone https://github.com/sap/pyrfc.git
Cloning into 'pyrfc'...
remote: Enumerating objects: 2478, done.
remote: Counting objects: 100% (587/587), done.
remote: Compressing objects: 100% (346/346), done.
Receiving objects: 100% (2478/2478), 34.31 MiB | 8.38 MiB/s, done.d 1891 eceiving objects: 100% (2478/2478), 33.40 MiB | 8.34 MiB/s

Resolving deltas: 100% (1340/1340), done.
PS C:\src\test> cd pyrfc
PS C:\src\test\pyrfc> python setup.py bdist_wheel  
750 Patch Level 8
running bdist_wheel
running build   
running build_py
creating build
creating build\lib.win-amd64-3.7
creating build\lib.win-amd64-3.7\pyrfc
copying src\pyrfc\_exception.py -> build\lib.win-amd64-3.7\pyrfc
copying src\pyrfc\__init__.py -> build\lib.win-amd64-3.7\pyrfc  
running build_ext
building 'pyrfc.pyrfc' extension
creating build\temp.win-amd64-3.7
creating build\temp.win-amd64-3.7\Release
creating build\temp.win-amd64-3.7\Release\src
creating build\temp.win-amd64-3.7\Release\src\pyrfc
C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.24.28314\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:\Tools\Pythons\3.7.6\include -IC:\Tools\Pythons\3.7.6\include "-IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.24.28314\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-amd64-3.7\Release\src/pyrfc/_pyrfc.obj -IC:\Tools\nwrfcsdk\include -IC:\Tools\Pythons\3.7.6\lib\inspect.py\Include -IC:\Tools\Pythons\3.7.6\lib\inspect.py\Include\PC /EHs /Gy /J /MD /nologo /W3 /Z7 /GL /O2 /Oy- /we4552 /we4700 /we4789
_pyrfc.cpp
src/pyrfc/_pyrfc.cpp(4021): warning C4244: '=': conversion from 'Py_ssize_t' to 'unsigned int', possible loss of data
C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.24.28314\bin\HostX86\x64\link.exe /nologo /INCREMENTAL:NO /LTCG /DLL /MANIFEST:EMBED,ID=2 /MANIFESTUAC:NO /LIBPATH:C:\Tools\Pythons\3.7.6\libs /LIBPATH:C:\Tools\Pythons\3.7.6\PCbuild\amd64 "/LIBPATH:C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.24.28314\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-amd64-3.7\Release\src/pyrfc/_pyrfc.obj /OUT:build\lib.win-amd64-3.7\pyrfc\pyrfc.cp37-win_amd64.pyd /IMPLIB:build\temp.win-amd64-3.7\Release\src/pyrfc\pyrfc.cp37-win_amd64.lib -LIBPATH:C:\Tools\nwrfcsdk\lib -LIBPATH:C:\Tools\Pythons\3.7.6\lib\inspect.py\PCbuild /NXCOMPAT /STACK:0x2000000 /SWAPRUN:NET /DEBUG /OPT:REF /DEBUGTYPE:CV,FIXUP /MACHINE:amd64 /nologo /LTCG
   Creating library build\temp.win-amd64-3.7\Release\src/pyrfc\pyrfc.cp37-win_amd64.lib and object build\temp.win-amd64-3.7\Release\src/pyrfc\pyrfc.cp37-win_amd64.exp
Generating code
Finished generating code
installing to build\bdist.win-amd64\wheel
running install
running install_lib
creating build\bdist.win-amd64
creating build\bdist.win-amd64\wheel
creating build\bdist.win-amd64\wheel\pyrfc
copying build\lib.win-amd64-3.7\pyrfc\pyrfc.cp37-win_amd64.pdb -> build\bdist.win-amd64\wheel\.\pyrfc
copying build\lib.win-amd64-3.7\pyrfc\pyrfc.cp37-win_amd64.pyd -> build\bdist.win-amd64\wheel\.\pyrfc
copying build\lib.win-amd64-3.7\pyrfc\_exception.py -> build\bdist.win-amd64\wheel\.\pyrfc
copying build\lib.win-amd64-3.7\pyrfc\__init__.py -> build\bdist.win-amd64\wheel\.\pyrfc
running install_egg_info
running egg_info
creating src\pyrfc.egg-info
writing src\pyrfc.egg-info\PKG-INFO
writing dependency_links to src\pyrfc.egg-info\dependency_links.txt
writing requirements to src\pyrfc.egg-info\requires.txt
writing top-level names to src\pyrfc.egg-info\top_level.txt
writing manifest file 'src\pyrfc.egg-info\SOURCES.txt'
reading manifest template 'MANIFEST.in'
warning: no previously-included files matching '*' found under directory 'material'
warning: no previously-included files found matching 'PyRFC.code-workspace'
writing manifest file 'src\pyrfc.egg-info\SOURCES.txt'
Copying src\pyrfc.egg-info to build\bdist.win-amd64\wheel\.\pyrfc-2.4.2-py3.7.egg-info
running install_scripts
C:\Tools\Pythons\3.7.6\lib\site-packages\wheel\bdist_wheel.py:82: RuntimeWarning: Config variable 'Py_DEBUG' is unset, Python ABI tag may be incorrect
  warn=(impl == 'cp')):
C:\Tools\Pythons\3.7.6\lib\site-packages\wheel\bdist_wheel.py:87: RuntimeWarning: Config variable 'WITH_PYMALLOC' is unset, Python ABI tag may 
be incorrect
  sys.version_info < (3, 8))) \
adding license file "LICENSE" (matched pattern "LICEN[CS]E*")
creating build\bdist.win-amd64\wheel\pyrfc-2.4.2.dist-info\WHEEL
creating 'dist\pyrfc-2.4.2-cp37-cp37m-win_amd64.whl' and adding 'build\bdist.win-amd64\wheel' to it
adding 'pyrfc/__init__.py'
adding 'pyrfc/_exception.py'
adding 'pyrfc/pyrfc.cp37-win_amd64.pdb'
adding 'pyrfc/pyrfc.cp37-win_amd64.pyd'
adding 'pyrfc-2.4.2.dist-info/LICENSE'
adding 'pyrfc-2.4.2.dist-info/METADATA'
adding 'pyrfc-2.4.2.dist-info/WHEEL'
adding 'pyrfc-2.4.2.dist-info/top_level.txt'
adding 'pyrfc-2.4.2.dist-info/RECORD'
removing build\bdist.win-amd64\wheel
PS C:\src\test\pyrfc> 

[raviteja-oops]

Python -- 3.7.4 pyrfc -- 2.4.2

[bsrdjan]

Could you please try if this works on your system and post the full log if there are errors:

git clone https://github.com/sap/pyrfc.git
cd pyrfc
python setup.py bdist_wheel

[raviteja-oops]

C:\PyRfc>git clone https://github.com/sap/pyrfc.git Cloning into 'pyrfc'... fatal: unable to access 'https://github.com/sap/pyrfc.git/': OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to github.com:443

Getting above error while cloning. So I downloaded the zip file from github directly and unzip in C drive

[bsrdjan]

No idea what might be wrong. I could not reproduce with Python 3.7.4 either.

Perhaps to try on another machine and check if correct SAP NWRFC SDK is installed, like 64 bit Windows version, not 32 bit ?

[raviteja-oops]

okay, Is there any problem with Visual Studio..?? As in error it is showing like below

src/pyrfc_pyrfc.cpp(21148): error C2664: 'RFC_RC RfcInstallGenericServerFunction(RFC_SERVER_FUNCTION,RFC_FUNC_DESC_CALLBACK,RFC_ERROR_INFO )': cannot convert argument 1 from 'RFC_RC (__cdecl )(RFC_CONNECTION_HANDLE,RFC_FUNCTION_HANDLE,RFC_ERROR_INFO *)' to 'RFC_SERVER_FUNCTION' src/pyrfc_pyrfc.cpp(21148): note: None of the functions with this name in scope match the target type C:\nwrfcsdk\include\sapnwrfc.h(2266): note: see declaration of 'RfcInstallGenericServerFunction' src/pyrfc_pyrfc.cpp(29685): warning C4018: '<': signed/unsigned mismatch error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30133\bin\HostX86\x86\cl.exe' failed with exit status 2

[bsrdjan]

Yes, it might be an issue with the build toolchain.

Please check if all requirements are met: https://github.com/SAP/PyRFC#windows

[raviteja-oops]

Okay and also do you have any installation steps of SAPNWRFC SDK and pyrfc for Ubuntu 18.04.3..??

[bsrdjan]

Here it is: http://sap.github.io/PyRFC/install.html#linux

You also check installation steps in these docker containers: SAP/fundamental-tools/docker

[raviteja-oops]

Thank you so much...!

And I'm able to install in my windows VM and I wrote some code for connection check. But I'm getting below error. Can you please suggest what is the error exactly is

E:>py sapbw_connectivity.py Config File Path:D:\SAPBW\CONFIG\SAPBW_CONFIG.ini RfcLogWrite: could not open E:\.\dev_rfc_07236.log. Trace directory set to .\Traceback (most recent call last): File "sapbw_connectivity.py", line 79, in src_db = sap_bw.get_sapbw_details(source_host_name, source_user_name, source_password,source_port_num, source_client_id) File "sapbw_connectivity.py", line 34, in get_sapbw_details passwd=m_pass_word) File "src/pyrfc/_pyrfc.pyx", line 260, in pyrfc.pyrfc.Connection.init File "src/pyrfc/_pyrfc.pyx", line 306, in pyrfc.pyrfc.Connection._open File "src/pyrfc/_pyrfc.pyx", line 349, in pyrfc.pyrfc.Connection._error pyrfc._exception.CommunicationError: RFC_COMMUNICATION_FAILURE (rc=1): key=RFC_COMMUNICATION_FAILURE, message= LOCATION CPIC (TCP/IP) on local host INFNWR2CRPADEV1 with Unicode ERROR connection to partner 'sapbiwdev102.isus.emc.com:3317' broken TIME Fri Oct 01 06:00:41 2021 RELEASE 753 COMPONENT NI (network interface) VERSION 40 RC -6 MODULE D:/depot/bas/753_REL/src/krn/si/gw/gwxx.c LINE 1179 DETAIL NiIRead: P=10.196.128.13:3317; L=10.179.194.90:55061 SYSTEM CALL GwRead ERRNO 10054 ERRNO TEXT WSAECONNRESET: Connection reset by peer COUNTER 2 [MSG: class=, type=, number=, v1-4:=;;;]

[raviteja-oops]

Can you please check above error

[bsrdjan]

It looks like a network error. Please check your system connection parameters.

You can also run the niping utility on your Python host, to check the connectivity with ABAP system: https://github.com/SAP/PyRFC/issues/241#issuecomment-931132332

[jfilak]

If you cannot install niping for any reason, you can also try TCP/IP connectivity by the utility telnet which is most probably avialbe on all operating systems.

If I try telnet on a live system with instance (sysnr) 02 with random input, I run the following on command line

telnet XXX.YYY.ZZZ.WWW 3302

and I get:

Trying XXX.YYY.ZZZ.WWW...
Connected to XXX.YYY.ZZZ.WWW.
Escape character is '^]'.

so I type:

HELLO

and the response is

Connection closed by foreign host.

But if I cannot connect to the system becuase of any TCP/IP problems (e.g. I unplug my ethernet cable), telnet hangs with:

Trying XXX.YYY.ZZZ.WWW...

[raviteja-oops]

yes, I'm able to hit the host using telnet. But via python I'm not able to connect over windows VM.

But I'm able to connect via python using my local windows machine

[bsrdjan]

via python I'm not able to connect over windows VM.

My test VMWare VMs work in network shared mode. Perhaps you can try shared and bridged:

?

[raviteja-oops]

Hi, I checked with windows server support team and they said the firewall is blocking the destination port. So, I'm unable to connect via windows VM.

Thank you for the support..