ORA-19606: Cannot copy or restore to snapshot control file
Cause: A control file copy or restore operation specified the name of the snapshot control file as the output file. It is not permitted to overwrite the snapshot control file in this manner. Other methods are available to create the snapshot control file.
Action: Specify a different file name and retry the operation. If this is a restore, then the restore conversation remains active and more files may be specified.
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ORA-19606Cannot copy or restore to snapshot control file