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[an error occurred while processing this directive] $SessionID

  • $SessionID is a number set up to be unique to a particular Mathematica session.
  • $SessionID should be different for different Mathematica sessions run either on the same computer or on different computers.
  • The value of $SessionID is based on $MachineID, as well as AbsoluteTime[ ] and operating system parameters such as the Mathematica process ID.
  • See the Mathematica book: Section 2.6.3Section 2.13.5.
  • See also: $ModuleNumber, $ProcessID.