Too many devices defined in DOS (over approximately  32)...
Device Table Overflow.

      Meaning: This error message occurs while the shell is being
               loaded and indicates that the DOS device table is too
               full  for the Network device could not be inserted into
               it as the  shell was loaded.

      Cause:  As the NetWare shell is loaded on top of DOS, it  attempts
              to insert the Network device into the DOS device  table.
              If the table is full (approximately 32 entries) then  this
              error message is displayed and the shell is aborted.

      Solution:  Remove some of the device drivers that are loaded  in
                 the CONFIG.SYS file.  Then reboot the system and
                 attempt  to load the shell again.