OPC UA Node error

[oisin.gribben]

Hi,

We have a Module that has been running on our projects for few years but we have noticed that since we updated ignition to 8.1 we receive this error.

Caused by: java.lang.ClassNotFoundException: org.eclipse.milo.opcua.sdk.server.api.nodes.Node

Has something changed to kick up this error?

[pturmel]

Yes. It may be as simple as recompiling your module with v8.1 dependencies. See this discussion:

Automation Professionals' Image Streamer Driver Module

Yes, turns out there was a binary incompatible change. You need to recompile against the 8.1 SDK (so you compile against Milo 0.5). It’s pretty interesting. It starts with this change: https://github.com/eclipse/milo/commit/1f19f5eb6fb2d553e544a0ee45212c1b566e7e94 This in itself would be an API incompatible change, when used directly, but that’s not what got you. The NodeManager interface takes a type parameter T that has an upper bound on the previously mentioned Node interface that changed …