Trend capture in Aveva Historian 2020

The best approach is to reach out to Technical Support. Before that, you could do

• Ensure that the Historian property of trend tags should be set True.
• Check the connector logs that are by default located at C:\ProgramData\Wonderware\Citect SCADA Connector\Log
• Have a look at logs if there is any error in the trend related events. As highlighted in the screen capture below, confirm if the trend tags with missing samples are listed in the logs (within the data aquisition window - 10 mins by default)

Thanks for the response, all of that was done to begin with, tech support gave me the answer. 

Hi Charles ,

Can you confirm the answer for others benefit? Was it the missing backfill HF wasn't installed on your machine?

(SE.HistorianConnector.dll.zip)

Going to, but he basically gave me a set of instructions I followed, but I haven’t had time yet to digest it and figure out why it fixed the problem

Going to, but he basically gave me a set of instructions I followed, but I haven’t had time yet to digest it and figure out why it fixed the problem

So Tech Support contacted me when they saw this posted on the forum, that was great. Essentially he had me shut the connector service down clear the data folder and restart. This re-initiated the backfill config. It worked, I can' say I fully understand why because all of those trends existed when we initially switched to wonderware Historian and installed the connector so they should have been grabbed the first time. Sometime you just have to be okay with "It's fixed".

I'd definitely recommend applying this Hotfix, as the symptoms of the HF sound like your problem:
"If there are any gap in the trend data, trend requests from connector never proceed"

Download here:

https://softwaresupportsp.aveva.com/#/producthub/details?id=253f847b-347a-4a0b-bd00-6e50b5adf424

See readme instructions on how to apply the HF.