Library /sys$common/syshlp/ctf$help.hlb SPAWN, /WAIT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  /WAIT
  /NOWAIT

 	Specifies whether the system waits until the current
 	sub-process is completed before allowing more commands to be
 	issued by the parent process.

 	The default is /WAIT.