[ISS Support Case] slow retrieval from Historical Trend

Last updated: October 17th, 2025

Description

something happened 1/28/2022 20.1.001 Historian version on Windows 2016 2020R2 P1 on windows 10 20H2 old 2014 running on server 2012 and sql 2012 new 2020 running on 2016 and sql 2019 see cust logs in box

Author: Kevin Modlin
Published: October 17th, 2025

Details:

Product: Historian

Version: 2020 R2

Solution: [Solution is visible below when you're logged in and have a current subscription]

Date Created:	04/19/2022
Case:	80882

Give feedback about this article

Recommended articles

[ISS Support Case] Historian loses connection after shutting down

If the historian is shut down and disabled then re-enabled it doesn't connect to tags that haven't changed. Reboot re-establishes connection.

[ISS Support Case] Trying to access old history blocks

They have a very old system they're trying to open a trend or see the data, but they don't see a trend program and can't figure out how to open the file. They believe they have the data, but it's running in demo mode and won't show data. This is an offline PC and they want to avoid putting it online, so we can't do a screen share.

[ISS Support Case] Trend SQL Login Failure

Client reached out due to receiving time out error message when logging into SQL to View Trends remotely on Development node.

[ISS Support Case] Wanting to pull 9 months of historized data

-Customer is wanting Historized data from the last 9 months in a .CSV file. Or in SQL. and wants to know the best practices.