version skew between library and UAF file Explanation: Each DCE$UAF.DAT file contains a special version record that is added when the file is created and read each time the file is opened. If the version information in the file record is not compatible with the internal version of the file-control library, then this message is returned, and any attempt to read or write authorization data from or to the file will be aborted. The message indicates an incompatibility between the DCE$UAF.DAT file and the file-control library. This can only happen as a result of the installation of newer software on a system with an existing DCE$UAF.DAT file. User Action: Convert the older-format file to the format required by the new software.