[foxboro] Legacy Historian Modifications

I hope that everyone had a Merry Christmas.

I have to make some modifications to a legacy historian...mostly to existing
points already in the historian.  I want to keep my downtime to a minimum.
What is the best way to go about these modifications.

This is what I have done thus far...

I have created an ASCII file, from the existing historian, and made changes
to this file. Then I uploaded it into the historian.  I knew I would get
some errors because of the points that were already existing but it did not
make changes to the points that I wanted to make changes to.

Do I need to delete those points from the historian first and then upload
the modified ASCII file into the historian?  If I do this will it keep the
existing index numbers? ( I want to retain the history of the points I am
trying to modify).

Regards,

Michael L. Jaudon
Kerr-McGee Chemical LLC
(662)343-8710
mjaudon@xxxxxxx

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