Error message if there is a Client/Server miss-match is reversed.
If the Client and Server try and connect using different versions of ParaView, the error message is opposite of what it should be. It is reporting the client as the server and the server as the client. Please see the error below for an example. Notice that the Client reports as version 5.11, however, I started version 5.12 as the client. I discovered the server was at 5.11, and that was the problem.
This is version 5.12.0-RC1-kw of ParaView. PV_INSTALL_DIR is /snip/5.12.0-RC1-kw/Linux-cee-rhel7-x86_64
[1] 97892 Rendering in Hardware!
VisRTX 0.1.6, using devices: 0: GRID V100S-4Q (Total: 4.3 GB, Available: 2.6 GB) Accepting connection(s): snip:11111 Accepting connection(s): snip:11111 ( 284.763s) [paraview ]vtkTCPNetworkAccessMana:553 ERR| vtkTCPNetworkAccessManager (0xba7450): Client and server are different ParaView versions. Client reports version: 5.11 but server is version 5.12 ( 284.767s) [paraview ]vtkTCPNetworkAccessMana:322 ERR| vtkTCPNetworkAccessManager (0xba7450):
Connection failed during handshake. The server has a different ParaView version than the client.