The following logical variables can be used to control the behavior of certain commands. They are fully described in the manual Guide to DIGITAL Test Manager for OpenVMS Systems or in the product Release Notes. DTM$DATE_FILTER_FIRST DTM$DATE_FILTER_MAX_YEAR DTM$DATE_FILTER_MIN_YEAR DTM$DATE_FILTER_STRING DTM$DATE_MASK_MAX_YEAR DTM$DATE_MASK_MIN_YEAR DTM$DELAY_TIMEOUT DTM$IGNORE_PROLOGUE_ERRORS DTM$OMIT_PRINTABLE_SCREENS DTM$RETAIN_RESULTS DTM$TIME_FILTER_NO_SPACE