Answer / guest

Cause: User attempted to add or enable a primary key/unique
constraint on column(s) of a table on which there exists an
index marked Index Unusable.

Action: Drop the existing index or rebuild it using ALTER
INDEX REBUILD

Please add more information about this Error

ORA-00204: error in reading (block string, # blocks string) of controlfile

1 Answers  

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LSX-00122: value is not valid restriction of parent's whiteSpace

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ORA-39064: unable to write to the log file

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ORA-02790: File name is too long

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ORA-01284: file string cannot be opened

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NZE-28790: NLS string open failure

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DRG-12218: section group name missing

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ORA-16100: not a valid Logical Standby database

1 Answers  

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ORA-27004: invalid blocksize specified

1 Answers  

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NNO-00262: warning: cannot write checkpoint file "string"

1 Answers  

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