ORA-19993：must specify FROM PLATFORM for cross-platform backup of backup pieces with compatibility set prior to 12.1
错误码
错误描述：must specify FROM PLATFORM for cross-platform backup of backup pieces with compatibility set prior to 12.1
错误原因：A cross-platform backup was requested for a backup piece created with compatibility prior to 12.1 without providing the platform name that created it.
解决方法：Reissue the command including the FROM PLATFORM clause.
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