NodeId seems not to be set for MonitoredItemCreateResult

[nachtmam]

I tried to create some monitored items for a subscription. Code snipped attached, but it looks like the MonitoredItemCreateResult containing the result does not contain the NodeId.

Code:

let node_ids = vec![1007, 1002];

let items_to_create: Vec<MonitoredItemCreateRequest> = node_ids
            .iter()
            .map(|v| NodeId::new(ns, *v).into())
            .collect();

let results = session
            .create_monitored_items(id, TimestampsToReturn::Both, &items_to_create)
            .unwrap();
debug!("status_code {:?}", results);

Output :

status_code [
MonitoredItemCreateResult { 
status_code: HISTORICAL_RAW | Good, monitored_item_id: 1, revised_sampling_interval: 100.0, revised_queue_size: 1, filter_result: ExtensionObject { 
node_id: NodeId { namespace: 0, identifier: Numeric(0) }, body: None } }, 

MonitoredItemCreateResult { 
status_code: HISTORICAL_RAW | Good, monitored_item_id: 2, revised_sampling_interval: 100.0, revised_queue_size: 1, filter_result: ExtensionObject {
node_id: NodeId { namespace: 0, identifier: Numeric(0) }, body: None } }
]

Has anyone seen a similar issue ?

[milgner]

The node_id you're looking at is part of the filter_result. But since you don't have any filters, it's empty.
The message itself doesn't contain any node id. Often in OPC UA, one is expected to keep state from the invocation in order to interpret the response: the Read service response can only be interpreted if you know what ReadValueIds you used to invoke it.