How do I solve this endless loop?

Basically it says Cleanup has failed so i should run Cleanup.

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I've moved all my files to my new computer, installed SVN, but it doesn't seem to be able to do any operations on the transferred archive.

Is "svn cleanup" something different than RMB>TortoiseSVN>Cleanup"?

Have you installed the 64bit version of TortoiseSVN?

Yes. I should use that, right?

Did you get the problem figured out?

According to some stuff I read, you might be able to fix it by deleting (maybe just move it elsewhere in case this does not fix the problem) the E:\_BI_Projects\hash\2006Film\_TWO\data\.svn\tmp folder and then doing the cleanup.

No, I'm still stuck on this.

But there isn't such a folder anyway

Maybe create a "tmp" folder in your .svn directory?

If that doesn't work, perhaps you can create a folder in your data/.svn directory with this structure:
|.svn
|_prop-base
|_props
|_text-base
|_tmp

If that doesn't work, try:
|.svn
.|_prop-base
.|_props
.|_text-base
.|_tmp
..|__ prop-base
..|__ props
..|__text_base

If those don't work, maybe move one of the smaller top-level folders to a different location on your hard drive and run an "Update".
That's all I can think of.

I tried adding the missing folders but it still doesn't work.

The problem in the error message seems to involve the missing "log"

is that a text file?

I can't see a log file in any other folder

All the files in the svn folders appear to be text files with no file extensions, but none of my svn/tmp folders have any files at all so I can't check to see what a log file looks like.
Another idea:
Move any files you changed since your last "commit" and try a "Revert" command on the whole shebang.
If that doesn't work, maybe you can get Jason to zip up the TWO\data\.svn folder and send it to you.