We're migrating from Citect 2016 ->2018 (Soon to go to 2023)
Anyway, our historian is Citect 4.6. (Also about to be upgraded, but got to stay online until upgrade complete.)
We have changed our primary server to 2018 and get a successful connection notice.
But when we try to import the Schema we get the error on reading Cluster seen below.
the allowlegacyconnection ini parameter is set to 7400