I used EthernetKRL_Server.exe file to send data using their own interface and then there wasnt any issue( by directly copy-pasting the xml file).
I think here a different network is used (SMEM)
But while using python the connection issue is popping up.
did you run your python on the krc (SEM) or from a different computer (LAN)?
In this case you are using a network which cannot be reached by your program unless your kli settings are correct