83548 - Historian fails to connect to Citect 2018

Problem

We are migrating our Citect from 2016 to 2018 and the historian is having trouble connecting to the 2018 server. The connection says successful, until we try to import the schema. Then we get error in attached screenshot.

Version: 4.70

Service Pack:

OS: Windows Server 2008 64 bit

OS Service Pack:

Solution

Notes in email chain below. The backfill.dll was not matching up and needed to be the same.

Close Date: 3/1/23 12:30