>>A CDX is always open when its table is in use. I noticed that a reindex can speed a little the app when the table is big and it was very much modified.
>>
>But it's not essential at any time, even for Pack/Zap? Maybe just occasional maintenance reindexing on large busy tables will do?

As long as everything goes fine, I don't see any reason to be essential. But I may be wrong here. I would like to hear more opinions about it.

Vlad