Novell NETWARE 6-DOCUMENTATION Manual page 2925

Modules Not Allowed in Protected Address Spaces
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Address_Space1
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Address_Space2
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Address_Space3
Replacing visible page translations is part of a context switch. Context
switches take place when the NetWare kernel changes from running one
thread to running another thread.
The following NLM programs and executables cannot be loaded into a
protected space:
SERVER.EXE
LAN and disk drivers
Hardware and LAN drivers make calls to the operating system and the
processor that are not allowed from the protected address spaces.
MONITOR
MONITOR makes calls to the operating system that are not allowed from
protected address spaces.
Modules that use interrupt time processing
Modules that use direct operating system interfaces
Modules that import operating system data items
Other modules or applications that aren't designed to run in protected
address spaces
Memory Management System
Understanding Server Memory
13