/sys$common/syshlp/helplib.hlb DTM, SPAWN, Command Qualifiers, /LOGICAL_NAMES  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   /LOGICAL_NAMES (D)
   /NOLOGICAL_NAMES

   Determines whether the system passes process logical names and
   logical name tables to the subprocess, except those marked CONFINE
   or those created in executive or kernel mode.