load _pyrfc.pyd in Windows also need Microsoft vs runtime

[JunyanHe]

I met a problem during importing pyrfc although I have installed SAPNWRFC before,

import pyrfc
Traceback (most recent call last):
File "", line 1, in
File "C:\Python27\lib\site-packages\pyrfc-1.9.4-py2.7-win-amd64.egg\pyrfc__in
it__.py", line 22, in
from pyrfc._pyrfc import get_nwrfclib_version, Connection, TypeDescription,
FunctionDescription, Server
ImportError: DLL load failed: The specified module could not be found.

I spent a lot of time to investigate the root cause of this. Finally, I found the _pyrfc.pyd may be compiled with MSVS, in my case, MSVS 2015. I downloaded and installed Visual C++ Redistributable for Visual Studio 2015 to resolve this problem.
https://www.microsoft.com/en-us/download/details.aspx?id=48145

I suggest to note the version of Visual Studio to installation manual to avoid similar problem. Thanks.

[bsrdjan]

Thank you very much for the very good suggestion. I leave it open, as a reminder to add to manual.

[bsrdjan]

Closed with README fix.

[bsrdjan]

Just a quick troubleshooting tip.

After the SAP NW RFC Library installed on Windows system and lib subfolder added to path, you may start the rfcexec.exe test program, from the bin subfolder, to verify the SAP NW RFC Lib installation.

If the popup comes up with an error indicating that SAPNWRFC.dll (or another DLL from the lib folder) is missing, although the dll is there, the most likely cause is that Microsoft redistributable is missing, or not installed properly.