Hello again (Andy), A new question. When I try to use the 5.4.3 client, I get the following error: [arossi@fndcatemp1 ~]$ xrdcp54 -f xroot://fndcatemp2.fnal.gov:1094//pnfs/fs/usr/fermilab/users/arossi/tape/data_1b /dev/null Plugin version SecClnt v5.4.3 is incompatible with secztn v5.5.1 (must be <= 5.4.x) in sec.protocol libXrdSecztn-5.so [1B/1B][100%][==================================================][0B/s] debug log (relevant lines): [2023-02-16 12:18:30.220151 -0600][Debug ][XRootDTransport ] [fndcatemp2.fnal.gov:1094.0] kXR_protocol successful (type: manager [], protocol version 500) [2023-02-16 12:18:30.220416 -0600][Debug ][XRootDTransport ] [fndcatemp2.fnal.gov:1094.0] Sending out kXR_login request, username: arossi, cgi: xrd.cc=us&xrd.tz=-6&xrd.appname=xrdcp&xrd.info=&xrd.hostname=fndcatemp1.fnal.gov&xrd.rn=v5.4.3, dual-stack: false, private IPv4: false, private IPv6: false [2023-02-16 12:18:30.220455 -0600][Debug ][AsyncSock ] [fndcatemp2.fnal.gov:1094.0] TLS hand-shake exchange. [2023-02-16 12:18:30.231664 -0600][Debug ][AsyncSock ] [fndcatemp2.fnal.gov:1094.0] TLS hand-shake exchange. [2023-02-16 12:18:30.236217 -0600][Debug ][AsyncSock ] [fndcatemp2.fnal.gov:1094.0] TLS hand-shake exchange. [2023-02-16 12:18:30.236454 -0600][Info ][AsyncSock ] [fndcatemp2.fnal.gov:1094.0] TLS hand-shake done. [2023-02-16 12:18:30.236564 -0600][Dump ][AsyncSock ] [fndcatemp2.fnal.gov:1094.0] Wrote a message: (0x50000be0), 118 bytes [2023-02-16 12:18:30.257334 -0600][Dump ][XRootDTransport ] [msg: 0x5003e290] Expecting 70 bytes of message body [2023-02-16 12:18:30.257384 -0600][Dump ][AsyncSock ] [fndcatemp2.fnal.gov:1094.0] Received message header, size: 8 [2023-02-16 12:18:30.257407 -0600][Dump ][AsyncSock ] [fndcatemp2.fnal.gov:1094.0] Received a message of 78 bytes [2023-02-16 12:18:30.257433 -0600][Debug ][XRootDTransport ] [fndcatemp2.fnal.gov:1094.0] Logged in, session: 3764e358bab6a3b2a07c00a87cd61c95 [2023-02-16 12:18:30.257450 -0600][Debug ][XRootDTransport ] [fndcatemp2.fnal.gov:1094.0] Authentication is required: &P=ztn,0:4096:&P=gsi,v:10400,c:ssl,ca:f5f0dfc2&P=unix [2023-02-16 12:18:30.257476 -0600][Debug ][XRootDTransport ] [fndcatemp2.fnal.gov:1094.0] Sending authentication data Plugin version SecClnt v5.4.3 is incompatible with secztn v5.5.1 (must be <= 5.4.x) in sec.protocol libXrdSecztn-5.so master of course (that's my client wrapper xrdcp5x) works fine, of course: [arossi@fndcatemp1 ~]$ xrdcp5x -f xroot://fndcatemp2.fnal.gov:1094//pnfs/fs/usr/fermilab/users/arossi/tape/data_1b /dev/null [1B/1B][100%][==================================================][0B/s] Is dCache not doing something we should be here? Thanks, Al ________________________________________________ Albert L. Rossi Senior Software Developer Scientific Computing Division, Scientific Data Services, Distributed Data Development WH 566 Fermi National Accelerator Laboratory Batavia, IL 60510 (630) 840-3023 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1