I'm not sure if this is a known error, but as I tried with TortoiseSVN and SlikSvn, I'm positive it's an upstream problem:
I use Windows 8.1 x64 and wanted to checkout the FreeBSD docs repositories. > svn co https://svn0.us-west.FreeBSD.org/doc/ This reproducibly leads to this error: > svn: E235000: In Datei > »..\..\..\subversion\libsvn_wc\update_editor.c«, Zeile 1550: > Assert-Anweisung schlug fehl (action == > svn_wc_conflict_action_delete) (Yes, I'm German. Hope that's not a problem. ;-)) Maybe some ideas? Regards.