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[an error occurred while processing this directive] $ProcessID

  • $ProcessID gives the ID assigned to the Mathematica kernel process by the operating system under which it is run.
  • On operating systems where no process ID is assigned, $ProcessID is None.
  • See the Mathematica book: Section 2.13.5.
  • See also: $ParentProcessID, $UserName, Environment, $SessionID.