pyrfc.Connection failed with "Conversion error between two character sets"

[georgik]

pyRFC version 1.9.99, Python 3.7, OS Windows 10.

Invoke of Connection(**params) to some server works (e.g. miniSAP and test env) and Connection to other servers (e.g. some production) fails with following error:

Traceback (most recent call last):
 ...
  File "src/pyrfc/_pyrfc.pyx", line 181, in pyrfc._pyrfc.Connection.__init__
  File "src/pyrfc/_pyrfc.pyx", line 239, in pyrfc._pyrfc.Connection._open
  File "src/pyrfc/_pyrfc.pyx", line 269, in pyrfc._pyrfc.Connection._error
pyrfc._exception.ABAPRuntimeError: RFC_ABAP_RUNTIME_FAILURE (rc=3): key=RFC_CONVERSION_FIELD, message=Conversion error between two character sets. [MSG: class=, type
=, number=, v1-4:=;;;]

I would appreciate any hint what could be wrong.

[bsrdjan]

The error usually indicates a gap in unicode/non-unicode configuration, on client and server side.

You could compare settings on working ABAP server with settings on non-working ABAP server, like

Extras -> System information -> Target system -> "Character set"

and ABAP Connection Settings, in SM59 transaction in ABAP system:

Above figures show one standard working configuration. Perhaps changed in affected system for some reason?

[georgik]

Thank you very much for the advice. It helped a lot.
Which doc/*.rst file is the best to include this information?
I can prepare PR for that.

[bsrdjan]

Sorry for the longer waiting, a section could be added here: http://sap.github.io/PyRFC/install.html#problems

Could be helpful for more miniSAP users.

[shrirang3010]

How can we use pyrfc.connection() for python3?

[bsrdjan]

How can we use pyrfc.connection() for python3?

https://github.com/SAP/PyRFC#getting-started