Node-Red is crashing after using OPC-UA Client Subscribe

Hi everyone.
For our production we want to use the IOT 2050 with the wonderful SIMATICmeetsLinux/IOT2050-NodeRed-OPCUA-Server example. Thanks to Bergmanu.

But before using it, we want to prove it locally on windows.
Everything works fine.

But we want to send the OPC UA values only if they are changing, not in a interval.

Like node-red-contrib-s7 : s7 in

So the OPC UA Client Read funktion don´t work for us because of the changing value problem.

I tried it with the Subscibe funktion, and it worked if i don´t bind it with the next OPC UA Client, which writes it in the OPC UA Server.

When i bind it, than Node-Red is crashing.

I tried a lot of other Datatypes. With INT64 its not crashing, but i can´t build INT64 as a variable/Object.



Is there any other possibility, to handle my problem? (Send values only if they are changing)

Thanks.