Hello,

It is normal for a Method Node to have multiple ComponentOf References, this just means that the Method is shared between multiple Nodes. When calling a Method in OPC UA, the caller will specify the NodeId of the Method and the NodeId of the Object or the ObjectType that References the Method with a HasComponent Reference. Therefore, there is no need for each instance of an ObjectType, such as OperationType, to have its unique instance of a Method since the combination of the NodeIds provided allows identifying which Method was called for which Object or ObjectType.

However, if you do want to create unique Methods for each instance of OperationType, you can set the NodeBuilderConfiguration of your NodeManagerUaNode to do that. This can be done by calling

nodeManagerUaNode.setNodeBuilderConfiguration(TypeDefinitionBasedNodeBuilderConfiguration.builder(new DefaultInstantiationStrategy(MethodInstantiationLogic.UNIQUE)).build());

where nodeManagerUaNode is your NodeManagerUaNode. You need to call this method before creating the OperationType instances. If you are already setting a NodeBuilderConfiguration to the NodeManagerUaNode, you will need to modify that part to use the DefaultInstantiationStrategy with UNIQUE MethodInstantiationLogic.