Oracle A423961 - Manual (Page 172)

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E – 28 Oracle7 Server Getting Started for Windows NT
ORA–06232: NETNMP: Unable to create a pipe instance
Named pipe could not be properly opened.
Ensure that Named Pipes software is installed properly in Windows NT and that
the Server machine is successfully started.
Codes 6401 – 6430: NETCMN Errors
This section lists and explains the error codes you might receive when using
SQL*Net. The error message descriptions in this section list possible causes for
the errors and suggest corrective actions. The messages in this section apply only
if you are using SQL*Net V1. For messages relating to use of SQL*Net V2, see
Oracle Network Products Messages Manual.
ORA–06401: NETCMN: invalid driver designator
The specified driver is unknown.
Check the last entry and resubmit the connect string using the designated name
for the SQL*Net driver.
ORA–06402: NETCMN: error receiving break message
The SQL*Net driver detected that its server has unexpectedly exited.
Check the network operating system and resubmit the connect string.
ORA–06403: NETCMN: cannot allocate context area
The SQL*Net driver could not allocate heap space for the context area.
Resubmit the connect string. Contact your DBA.
ORA–06404: NETCMN: invalid login string
The SQL*Net driver detected a syntax error in the database ID portion of the
user’s logon string.
Check the logon string and then correct the syntax error.
ORA–06405: NETCMN: reset protocol error
The SQL*Net driver detected an error while trying to reset the connection from a
break state.
Resubmit the connect string.