SwitchToReal ran out of non-dedicated work stacks.

  Occurs on:  ND286 only.  This is an Abend error.

    Meaning:  Nondedicated NetWare 286 allocates four stacks in memory
              for storing real mode interrupt information.  This error
              is displayed if all four stacks are still in use when
              another real mode interrupt occurs.

    Cause:  This error could be caused by inefficient interrupt routines
            that take a lot of time and cause the interrupts to stack
            up.  Cards in the I/O expansion slot that use interrupts can
            also cause this problem if they interrupt too often.

    Solution:  Except for the network interface cards, cards in the I/O
               expansion slot of a nondedicated file server should not
               use interrupts.  Interrupt driven hardware and software
               should not be used with Nondedicated NetWare 286.  Real
               time application software should especially be avoided.