When you assign a libref
to a file on a WebDAV server, the path (URL location), user ID, and
password are associated with that libref. After the first libref has
been assigned, the user ID and password will be validated on subsequent
attempts to assign another libref to the same library.
Note: Lock errors that you typically
would not see might occur if either a different user ID or the password,
or both, are used in the subsequent attempt to assign a libref to
the same library.