Answer / guest

Cause: All appropriate database instances supporting the
service requested by the client reported that they either
were in restricted mode or were blocking the new
connections. The Listener does not allow connections to such
instances. This condition may be temporary, such as at
instance startup.

Action: Attempt the connection again. If error persists,
then contact the database administrator to check the status
of the instances.

Please add more information about this Error

ORA-12519: TNS:no appropriate service handler found

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QSM-00768: the search condition is invalid for the requested operation

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ORA-39701: database must be mounted EXCLUSIVE for UPGRADE or DOWNGRADE

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KUP-02004: quoted string too big

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QSM-02016: clustered table in FROM list

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EXP-00039: export file string must be on a disk

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ORA-37130: (XSCCOMP05) Cannot aggregate VARIABLE workspace object using AGGMAP workspace object because there is a PRECOMPUTE clause on a RELATION over the base of a COMPRESSED COMPOSITE.

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ORA-19205: Attribute 'string' qualifies a non-scalar value in the select list

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RMAN-12018: channel string disabled, job failed on it will be run on another channel

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QSM-02019: mv references another mv in FROM clause

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