Answer / guest

Cause: the server encountered an error while accessing the
configuration database. The error can occur when the
database is unavailable, or SQL*Net connectivity to the
database is interrupted.

Action: Make sure that the database is running, that its
name and password as specified in the Oracle Network Manager
are accurate, and that there is SQL*Net connectivity between
the Oracle Names server and the database. To force the
server to start up anyway, using its checkpoint data, start
the server with the names.no_region_database parameter set
to TRUE. If no checkpoint data is available, the server will
shut down.

Please add more information about this Error

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