Oracle A423961 - Manual (Page 170)

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E – 26 Oracle7 Server Getting Started for Windows NT
ORA–06220: NETNMP: Server not specified in command line
A hostname is not specified in the DOS command–line after “p:”.
Specify the hostname after the network prefix and retry, or set the LOCAL
parameter in your configuration parameter file.
ORA–06221: NETNMP: Named pipe busy
Either the database to which you are trying to connect does not exist, or all
available Named Pipes instances are in use.
1: Check your connect string
2: Close any unused connections and retry the operation.
ORA–06222: NETNMP: Error allocating memory
The system is unable to allocate memory block.
Resubmit the entry. If the error persists, contact your DBA.
ORA–06223: NETNMP: Error receiving data from pipe
Oracle encountered an error when receiving data from the pipe.
Check all LAN connections and cables. If any connections are loose, secure them
and retry. Otherwise, reboot your machine and reload the SQL*Net Named
Pipes driver. If the error persists, contact your DBA.
ORA–06224: NETNMP: Error sending data to pipe
The system encountered an error sending data to the pipe.
Check all LAN connections and cables. If any connections are loose, secure them
and retry. Otherwise, reboot the machine and reload the SQL*Net Named Pipes
driver. If the error persists, contact your DBA.
ORA–06225: NETNMP: Invalid packet type
The system received erroneous data.
Check all LAN connections and cables. If any connections are loose, secure them
and retry. Otherwise, reboot the machine and reload the SQL*Net Named Pipes
driver. If the error persists, contact your DBA.