Answer / guest

Cause: When a dump file set consists of multiple files, all
files in the set must be specified for an import operation.
One of the files provided to import was found to be a
duplicate of another dump file in the set. This can occur if
the files in the dump set were copied or renamed using
operating system utilities and the same dump file was
inadvertently copied more than once with different
destination names.

Action: Remove the dump file indicated in the message and
retry the import operation providing only the complete set
of dump files created by a specific export job.

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