I'll try my best to explain the situation. Using Perspective and the Power Chart - specifically the Ad Hoc Trend view that I downloaded from the Exchange. Only things I modified were some styles on the view.
This project is storing historical data via 2 sources: 1 is just OPC tags and the other is from CSV data that is being imported via the system.tag.storeTagHistory.
The import of the CSV and storage to history is working well. I can drag/drop those virtual pens onto the Power Chart and everything works as intended. BUT when I save a graph that has those virtual pens and then try to load that graph back into the Power Chart nothing shows up. If I drag/drop one of the same pens onto the chart then I get a message in the console saying:
"[Browser Thread: 59170] INFO Perspective.Designer.Workspace - Unknown file drop."
If I drag/drop a virtual pen that wasn't originally included then it suddenly shows all the pens that were saved.
As I was writing this I decided to drag/drop the same OPC pen twice. Gives me the same message, which looks to be standard behavior. Even used a vanilla Power Chart on a fresh view and same result.
It looks like I have 2 questions: does the Power Chart only allow a single instance of a pen? And any idea why the Load Graph isn't loading the virtual pens? If I save a graph with just OPC pens then it loads just fine.
Thinking it has something to do with the virtual pens not actually existing in the tag browser. When I store them to history I am using the default provider so that they'll show up in the Tag Browse Tree of the Power Chart.
Thanks for any thoughts/feedback! While I wait for any responses I'll be digging into the AdHocTrend view and it's script to load the pens...maybe it wasn't meant to handle virtual pens.