/USER_FILTER=filename /USER_FILTER=(filename[,...]) /NOUSER_FILTER (D) The specified files are executed by DEC Text Processing Utility (DECTPU). If more than one file is specified they are executed in the order given. The user filters are applied before any built-in filters that are also specified on the command line. User filter files can be located either in OpenVMS directories or in Code Management System (CMS) libraries. Files may be specified using logical names including logical names that specify search lists. Wildcards cannot be used. For files in CMS libraries, the most recent generation on the main line of descent is used. Before the first file is executed the file to be filtered is read into the DECTPU buffer "filter_buffer". Next, the file specified by the logical name DTM$UFDEFINES is executed. The system logical name DTM$UFDEFINES references the file SYS$LIBRARY:DTM$UFDEFINES.TPU, which contains definitions of a global replace procedure and patterns which can be used in building filters. This logical can be redefined to point to a custom file. Any errors in accessing the user filter files or in executing the DECTPU commands will be reported. However, they will not cause the FILTER command to fail, and any remaining user and built-in filters will be applied. After all the user filters have been applied, the file being filtered will be written out. If any built-in filters are also specified, they are applied to the newly created file, resulting in a second new version.