svn - visualsvn error while loading existing repository

Question

On a windows 2008 server, a svn repository has been created using tortoisesvn from a remote Windows 7 machine. We would like to load the repository into VisualSVN, ref https://www.visualsvn.com/support/topic/00010/. After setting the file location and the new repository location, and clicking the import button, there is an error similar to the following message (written from memory).

error: Expected fs format between '1' and '4'; found format '6'

What should be done to resolve this error? I had read previous posts suggesting the issue was the svn version. Is it possible to save the repository in an older format? A command window was opened, but the commands svn and svnadmin were not recognized. On the bottom right of the VisualSVN server splash window, there is a link to show the version. The svn version was 1.6xxx.

Similar posts http://issues.tmatesoft.com/issue/SVNKIT-413 SVN Error: Expected fs format between '1' and '3'; found format '4'

Steps for upgrading visualsvn https://www.visualsvn.com/support/topic/00036/

This post is related to previous post: Access svn repository on windows host from linux redhat

One solution is to use svnadmin

location of svnadmin, see bottom of this link: https://www.visualsvn.com/support/topic/00010/

To migrate to different svn version, follow transfer repository steps: How do I export (and then import) a Subversion repository?

Migrate from toitisesvn to apachee/svn (VisualSVN) is described here: http://www.meinbinary.com/2009/09/migrating-local-repository-created-with.html

General migration proceedure is described here, towards the bottom: http://svnbook.red-bean.com/en/1.0/ch05s03.html#svn-ch-5-sect-3.5

Answer 1

What should be done to resolve this error?

Best and correct way:

Use up-to-date VisualSVN Server distro, which have also SVN 1.8.* at backend (3.0.1), not ancient as mammoth's bullshit version with older, than existing repository, FS format (SVN 1.6 can't handle 1.8 repositories)

Ugly and lame way

From Win7-box (or any other box, which have SVN 1.8 client and can reach original repo), create dump of repo and load this dump into still outdated existing VisualSVN Server installation (svnadmin must exist on path %VISUALSVN_SERVER%insvnadmin), using CLI-tools, not GUI