Kopano Archiver strange behaviour

[zkiss]

Hi!
We have a working multi server setup, which is for archiving purposes. At the testing phase the Archiver working well, with one user from direct CLI.
We wrote a script for the initial archiving which is running
kopano-archiver -u UNAME -A --auto-attach
kopano-archiver -u UNAME -A
in a for loop for the first 20 users.

And here is the problem :)
kopano-archiver sad that the user store cannot be opened, but only if I’m trying to run the archiver inside this little script.

Can you help me about that?
Kopano version is a little bit old: 8.4.5

Thanks for your help!

Cheers,
Zoltan