Answer / guest

Cause: Connection Manager and its listener were configured
with filtering rules specifying that the connect request be
rejected.

Action: If this connect request should be allowed, then
contact the administrator to modify the filtering rules.

Please add more information about this Error

ORA-13912: Critical threshold value is less than warning threshold value.

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TNS-01057: Program name: string

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PLS-00223: paramaterless procedure 'string' used as function

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ORA-38417: attribute set string does not exist

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NID-00137: All datafiles that are not dropped should be readable

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ORA-14005: missing RANGE keyword

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ORA-13832: category name specified is invalid

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ORA-29935: missing FROM keyword

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