In an R80.30 MDS take 19 this prevents you from exporting just 1 domain.
In this and also the previous versions it will try to stopp the complete MDS which resulted with me inthese error messages:
[1 Oct 11:01:40] [PreupgradeVerifierR80Runner::exec] Preupgrade verifier's output:
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Operation failed. Publish or Discard all sessions and run operation again. Administrators with open sessions:
a-474
a-800
a-503
a-821
a-021
admin
-------------------------------------
Above users did not have any changes made to the domain I was trying to export...
I know that in later Jumbo's this restriction is lifted, but this is not applied yet, however I don't know yet if the users will still be reported that do have changes pending but not for this domain.
Regards, Maarten