Oracle Error ORA-09851: soacon: Archmon unable to lock named pipe.

Oracle Error Message

ORA-09851: soacon: Archmon unable to lock named pipe.

Reason for the Error

fcntl() failed to set read lock on named pipe ?/dbs/mon2arch_@.

Solution

Make sure that archmon is not already active on another terminal for this ORACLE_SID. Only one archmon session is allowed at a time for a given instance.

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