Are you sure the directory you tried to upgrade is a 'working copy'? The way you describe it, it looks like it is a repository.
Subversion 1.9 and 1.8 can just use 1.6 repositories without upgrade. or you can run 'svnadmin upgrade' on them to enable new features. Bert From: Hom, Margaret [mailto:margaret....@ucsf.edu] Sent: zaterdag 20 februari 2016 02:30 To: users@subversion.apache.org Cc: Hom, Margaret <margaret....@ucsf.edu> Subject: upgrade Subversion from version 1.6 to svn, version 1.8.15 (r1718365) Hi, I installed version 1.8.15, copied the working directory from an existing 1.6 version server to this new server. I su logged in as subvadm, cd to working directory, cd to one of the working directory ais_repos. I issued the command 'svn upgrade', but I got the error not a working copy root, file not found error. (please see the following copy and paste). I am new to the Subversion. Please advise. Thanks, Margaret Hom UCSF [sfaismh@vx63 ~]$ su - subvadm Password: [subvadm@vx63 ~]$ cd /subv_repos [subvadm@vx63 subv_repos]$ cd ais_repos [subvadm@vx63 ais_repos]$ svn upgrade svn: E155019: Can't upgrade '/subv_repos/ais_repos' as it is not a working copy root svn: E000002: Working copy database '/subv_repos/ais_repos/.svn/wc.db' not found svn: E000002: Additional errors: svn: E000002: Can't open file '/subv_repos/ais_repos/.svn/entries': No such file or directory