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Recursive function for finding datanodes, not returning all datanodes - by: CMAC447

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Hello,
I am trying to create a function that will discover all of the available datanodes on an OPC server and document what is in them. The problem I am having is that most of the OPC nodes are not being read in. Attached is a picture showing what nodes I can and can't find.
Is there something wrong with how I call BrowseDataNodes?
Is there something wrong with my method for recursively
browsing the tree?

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