# Read value from different context

**URL:** <https://forum.inductiveautomation.com/t/read-value-from-different-context/8013>\
**Category:** Module Development\
**Created:** [February 15, 2014, 7:37pm UTC](https://forum.inductiveautomation.com/t/read-value-from-different-context/8013 "2014-02-15T19:37:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jworrall](https://avatars.discourse-cdn.com/v4/letter/j/4bbf92/32.png) [@jworrall](https://forum.inductiveautomation.com/u/jworrall)\
**Post date:** [February 15, 2014, 7:37pm UTC](https://forum.inductiveautomation.com/t/read-value-from-different-context/8013/1 "2014-02-15T19:37:19Z")

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Hi there!

I am trying to create a module that gathers data and returns it to an external user via a queue. I don’t have any local tags in my particular gateway context.

My other module works, and I can get the data via the following:

[code]OPCManager manager = context.getOPCManager();

BasicServerNodeId node = new BasicServerNodeId(“Ignition OPC-UA Server”,"[Test Device]TestData/Counters/CounterTest");  
List points = new ArrayList();  
points.add(node);

List values = manager.read(points);[/code]

This returns data. The path that I used matches the path in the Quick OPC client, and the data value and quality match as well.

However, I think it would be much more efficient to subscribe to the data since I need to pass it on every 30 seconds or so. I used the TagPathParser and then tried to create a SubscribableNode using the path. But it can’t seem to find the point this way. I’ve tried a variety of point paths. I also looked up what the path looks like as a SubscribableNode in the ScanClass using the Eclipse debugger. I’m sure I’m missing something here.

The path in the Designer looks like  
Default  
|  
± Devices  
|  
± Test Device  
|  
± TestData  
|  
+ Counters  
|  
± CounterTest

Thank you!  
Jennifer