Defeating “svn: Error processing command ‘modify-wcprop’ in ‘.’”
svn cleanup seems to do this when there is a partially completed update in a directory. (I think..) Try deleting the .svn/log file in the offending directory and doing svn cleanup again.
Thank you stackoverflow.

(10 votes, average: 4.60 out of 5)
April 15th, 2010 at 9:29 am
Thank you ! Got this error after kill -9 svn update … Last time I had to checkout all project again !
May 21st, 2010 at 10:20 am
[...] source: http://blog.arithm.com/2009/11/17/defeating-svn-error-processing-command-modify-wcprop-in/ [...]
July 21st, 2010 at 1:41 pm
Simple and straight to the point. Solved my problem. Thanks!
November 3rd, 2010 at 2:32 pm
Thank you ! It helped me to set svn to update by small chunks over a vpn deconnecting after a few minutes:
sudo vpnc-disconnect ; killall -9 svn ; find . -name log -exec rm ‘{}’ \; ; svn cleanup .; sudo vpnc-connect ; svn up &
December 15th, 2010 at 11:04 am
thank you for pointing this out, it fix my recent problem in a large tree
May 27th, 2011 at 11:42 am
[...] Defeating “svn: Error processing command ‘modify-wcprop’ in ‘.’” | blog.arithm. [...]
July 18th, 2011 at 1:16 am
thanks a lot.. that saved me a total download of a package.
November 24th, 2011 at 10:30 am
Many thanks and God bless you! It worked for me perfectly.