BadUnexpectedError on method call

[butzmeister]

Hi,
I'm getting an BadUnexpectedError when trying to call the 'node_1_illuminate_multiple_slots' method on 'art_net' using the code below.

This is my code:

parent_id = 'ns=3;i=1'
child_id = 'ns=3;i=11'

parent_node = self._client.get_node(parent_id)
child_node = self._client.get_node(child_id)
    
converted_args = []
for arg in args:
        converted_args.append(ua.Variant(arg, ua.VariantType.String))

out = await parent_node.call_method(child_node, converted_args)

Setup on Server:

Parent Node:

Child Node:

Calling the method with same arguments using node-RED and UaExpert works fine.

I can access the Nodes to read the available methods or read the description, but calling the method does not.

Has anyone had similar issues and can help?
Thank you!

[AndreasHeine]

how does the method inputarguments look like? is it really an array?

small example: https://github.com/AndreasHeine/opcua-tutorial/blob/main/client%2Fcall_method.py

[butzmeister]

thank you very much for the hint, andreas.
it's working now, I did not pass the input arguments correctly.

this is the working code:

parent_id = 'ns=3;i=1'
child_id = 'ns=3;i=11'

parent_node = self._client.get_node(parent_id)
child_node = self._client.get_node(child_id)
    
converted_args = []
for arg in args:
     converted_args.append(ua.Variant(arg, ua.VariantType.String))

out = await parent_node.call_method(child_node, converted_args[0], converted_args[1])