Hi, I noticed something odd recently and I am curios if the issue is a known feature, or something that needs to be worked on? A client process was moving files with xrdcp using: xrdcp -f -np --cksum adler32:print test-transfer root://some-server//some-path and the command fails with: Run: [ERROR] Invalid response Tracking this down leads me to the problem in the data server's configuration: xrootd.chksum adler32 /usr/bin/xrdadler32 However, if the checksum is configured as: xrootd.chksum max 4 adler32 The xrdcp will work correctly. Before anyone asks, yes, checksums work correctly outside of xrdcp: xrdadler32 root://some-server//some-path as well as: xrdfs some-server query checksum /some-path I have seen this occur with versions 4.9.1 and 4.10.0. Regards, Patrick ######################################################################## 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