Hey,

I have been tryign to configure xrootd to perform tpc over the root protocol and have mostly been trying to follow the instructions in the official reference and on the Xrootd HowTos (https://xrootd-howto.readthedocs.io/en/latest/tpc/) but I keep getting the error:

gfal-copy error: 52 (Invalid exchange) - Error on XrdCl::CopyProcess::Run(): [ERROR] Server responded with an error: [3030] [FATAL] Auth failed: No protocols left to try (source)

and I'm not sure how to debug it. I've attached the configuration I've been using so far. For the pgm parameter for ofs.tpc I've tried xrdcp, xrdcp --server, and the xrootd-tpc.sh script shown on the Xrootd HowTos

Thanks