when using mod_dav with apache I got this when I try to put files via WEBDAV: [Sun Jan 26 20:30:54 2003] [error] [client 10.0.0.4] The locks could not be queried for verification against a possible "If:" header. [500, #0] [Sun Jan 26 20:30:54 2003] [error] [client 10.0.0.4] Could not open the lock database. [500, #400] apache needs to create lockdb.dir and lockdb.pag files in "/var/lib/dav" thus the solution is simply give proper permissions to "/var/lib/dav" directory. #chown apache:apache /var/lib/dav fixes the problem.
fixed.