Since updating a test PC to 4.91 SP4, I am getting the following errors
in my login script. Examples of the script commands :

1. MAP INS S1:=\\HOBBES\SYS:\LOGIN\NAV
2. map s1:=\\hobbes\sys\public\
3. DOS SET ppp=platform
4. DOS SET nnn=network
5. DOS SET oss=os_version
6. DOS SET eee=ERROR_LEVEL




Here is the results screen (edited)

-----------

You are attached to server HOBBES.

LOGIN-LGNWNT32.DLL-720: This utility could not add NWLANGUAGE=ENGLISH
to the local environment variables.

LOGIN-LGNWNT32.DLL-430: The following drive mapping operation could not
be completed.
[INS S1:=\\HOBBES\SYS:\LOGIN\NAV]
The error code was 3456.
LOGIN-LGNWNT32.DLL-740: This utility could not execute external program
OSVER.
LOGIN-LGNWNT32.DLL-740: This utility could not execute external program
VP_Log32.
LOGIN-LGNWNT32.DLL-470: The specified drive mapping is an invalid path:
(DEL S1:)

Drive F: = HOBBES_SYS: \
Drive J: = CALVIN_SYS: \

LOGIN-LGNWNT32.DLL-430: The following drive mapping operation could not
be completed.
[S1:=\\HOBBES\SYS\PUBLIC\]
The error code was 9002.

LOGIN-LGNWNT32.DLL-720: This utility could not add PPP=WNT
to the local environment variables.
LOGIN-LGNWNT32.DLL-720: This utility could not add NNN=C0A801FE
to the local environment variables.
LOGIN-LGNWNT32.DLL-720: This utility could not add OSS=V5.01
to the local environment variables.
LOGIN-LGNWNT32.DLL-720: This utility could not add EEE=36866
to the local environment variables.