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.
From: Hom, Margaret [mailto:Margaret.Hom@ucsf.edu]
Sent: zaterdag 20 februari 2016 02:30
Cc: Hom, Margaret <Margaret.Hom@ucsf.edu>
Subject: upgrade Subversion from version 1.6 to svn, version 1.8.15 (r1718365)
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.
[sfaismh@vx63 ~]$ su - subvadm
[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