PROBLEM #1 (22 MAY 1987) EVA HATCHERSON:

  Various users were receiving a "MAILBOX is FULL" error when trying to spawn
a subprocess.

SOLUTION #1:

  Called DEC Support:

     SET PROCESS /RESOURCE   will allow the spawn to be done.

  What is happening is that the temporary mailbox (for that user?) is used
when a subprocess is spawned.  This problem occurs in heavily loaded systems.
Increasing the default system mailbox size will only mask the problem until 
the system load is greater.  It could help to modify (either increase or
decrease) the following parameters in AUTHORIZE:

             1) DIOLM
             2) BIOLM
             3) BYTLM

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