Answer / guest

Cause: When opening the file to be placed in a copy or
backup set, to be inspected, or used as the target for an
incremental restore, the header was not recognized as a
valid file header for a file of the indicated type (data
file, archived log, or control file), belonging to the
current database.

Action: Ensure that the correct files are being specified
for the copy or backup operation.

Please add more information about this Error

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TNS-12620: TNS:requested characteristic not available

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ORA-24413: Invalid number of sessions specified

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ORA-39953: the range value specified is beyond allowed range

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