Could you please send is what is the error you are facing.
Also send us the RFC traces if possible.
General guidelines to troubleshoot SAP connection issue is to first see the error.
And then take next action plans according to the error.
RFC trace gives more clarify on the error.
Tracing doesn't work because it starts to log only if there is a connection:
My sapnwrfc.ini is:
Changing the trace level has no effect.
Telnet to that machine to ports 3200 and 3300 work, so there are no tcp issue. At least no simple ones.
The error message I get is
This error occurs if your sapnwrfc.ini file is not configured correctly on the client machine or it is not in the right location.
Please let me know in which location have you placed the file.
Also let me know if there are any environment variable by name RFC_INI set on the window machine where this client is installed? If there is any such variable set, then delete that variable and place the sapnwrfc.ini file in the client/bin and try again.
The conf file is in the default location here:
RFC_INI has not been set.
As this is the same machine as the server, I'm wondering if there can be some PATH issues. Certainly there is no other sapnwrfc.ini files in the path.
What is the list of SAP NW RFC SDK libraries you have copied in the client/bin?
Also try taking backup of existing sapnwrfc.ini file and create a new file. Create only one DEST and see if that works as expected?
Also just re-verify if your user also has enough access on that file.