Lotus Notes Database "Invalid NSF Version"

I created an Archive for a user on my client running Notes 9.0
This was because his mail was large and he didn't want to give up his laptop for a few hours.

So I've copied the Archive to the user's PC but when he tries to open it he receives the error "Invalid NSF Version".
He is running the 8.5.3 FP6 (The corporate standard).

I thought this might have something to do with the "ODS"? ( I might be wrong, this is just from Googling).
In any case, does anybody know how I can downgrade or change the Database so that the user can open it?
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Compacting the database with ncompact.exe -R will revert the ODS to the previous version.
UnifraxAuthor Commented:
Tried that but still get the Invalid.nsf error
This is running from the 8.5.3FP6 client.

Assume I can't do it on mine because it will set it to v.9
No, you need to run it from your computer.

Since the file was created with the v.9 ODS format, only a v.9 installation can recognize that ODS format so it can be reverted to the previous version.
UnifraxAuthor Commented:
What do you mean by previous version?
The Notes Client knows the version prior to the current release?

The file was always v.9 ODS  as it was created in 9.0
ODS is just the internal structure of the file. It doesn't matter that the file never existed in the v.8 format. A v.9 client or server can "speak" v.8, which is what allows it to revert a v.9 structure to the v.8 structure.

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