SNIP
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>That command can only be bullet proof if no corruption is present on the tags. It can work, as you said, but we will never have any guarantee as depending on the level of corruption, it could affect the success of the operation.
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SNIP
The only thing I want to say is that corruption in a .CDX does NOT mean corruption of the CDX area storing the TAG information. In fact I would venture that the TAG area of the CDX is most UNLIKELY to suffer corruption unless an application rgeularly adds/deletes TAGS during its processing.

cheers