NNO-00263: error from configuration database
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.
NNO-00264
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NNO-00263error from configuration database