receiving alarm event issue

[zhu.li]

"No text available (internal error)" error is displayed in the Message content of the field in the receiving alarm event
Code:

Code: Select all

UaStatus SampleSubscription::createMonitoredItems()
{
       ......

       // Select EventId (BaseEventType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("EventId", 0), 1);
	eventFilter.setSelectClauseElement(0, selectElement, 15);
	// Select EventType (BaseEventType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("EventType", 0), 1);
	eventFilter.setSelectClauseElement(1, selectElement, 15);
	// Select SourceName (BaseEventType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("SourceName", 0), 1);
	eventFilter.setSelectClauseElement(2, selectElement, 15);
	// Select Time (BaseEventType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("Time", 0), 1);
	eventFilter.setSelectClauseElement(3, selectElement, 15);
	// Select Message (BaseEventType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("Message", 0), 1);
	eventFilter.setSelectClauseElement(4, selectElement, 15);
	// Select Severity (BaseEventType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("Severity", 0), 1);
	eventFilter.setSelectClauseElement(5, selectElement, 15);
	// Select BranchId (ConditionType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("BranchId", 0), 1);
	eventFilter.setSelectClauseElement(6, selectElement, 15);
	// Select ConditionName (ConditionType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("ConditionName", 0), 1);
	eventFilter.setSelectClauseElement(7, selectElement, 15);
	// Select Retain (ConditionType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("Retain", 0), 1);
	eventFilter.setSelectClauseElement(8, selectElement, 15);
	// Select AckedState -> Id (AcknowledgableConditionType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("AckedState", 0), 1);
	selectElement.setBrowsePathElement(1, UaQualifiedName("Id", 0), 2);
	eventFilter.setSelectClauseElement(9, selectElement, 15);
	// Select ConfirmedState -> Id (AcknowledgableConditionType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("ConfirmedState", 0), 1);
	selectElement.setBrowsePathElement(1, UaQualifiedName("Id", 0), 2);
	eventFilter.setSelectClauseElement(10, selectElement, 15);
	selectElement.clearBrowsePath();
	// Select ActiveState (AlarmConditionType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("ActiveState", 0), 1);
	eventFilter.setSelectClauseElement(11, selectElement, 15);
	// Select ActiveState -> Id (AlarmConditionType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("ActiveState", 0), 2);
	selectElement.setBrowsePathElement(1, UaQualifiedName("Id", 0), 2);
	eventFilter.setSelectClauseElement(12, selectElement, 15);
	// Select ActiveState -> EffectiveDisplayName (AlarmConditionType)
	selectElement.setBrowsePathElement(0, UaQualifiedName("ActiveState", 0), 2);
	selectElement.setBrowsePathElement(1, UaQualifiedName("EffectiveDisplayName", 0), 2);
	eventFilter.setSelectClauseElement(13, selectElement, 15);
	// Select Condition NodeId
	// This is special - the path is empty and the requested Attribute is NodeId
	selectElement.setTypeId(UaNodeId(OpcUaId_ConditionType));
	selectElement.setAttributeId(OpcUa_Attributes_NodeId);
	selectElement.clearBrowsePath();
	eventFilter.setSelectClauseElement(14, selectElement, 15);

        ......
}

void SampleSubscription::newEvents(
	OpcUa_UInt32                clientSubscriptionHandle, //!< [in] Client defined handle of the affected subscription
	UaEventFieldLists&          eventFieldList)           //!< [in] List of event notifications sent by the server
{
        OpcUa_UInt32 i = 0;
	printf("-- Event newEvents -----------------------------------------\n");
	printf("clientSubscriptionHandle %d \n", clientSubscriptionHandle);
	for (i = 0; i < eventFieldList.length(); i++)
	{
		EventObject newEvent;
		UaVariant(eventFieldList[i].EventFields[1]).toNodeId(newEvent.eventType);
		if (newEvent.eventType.identifierNumeric() == OpcUaId_RefreshStartEventType || newEvent.eventType.identifierNumeric() ==      OpcUaId_RefreshEndEventType)
			continue;

		// check if eventType and conditionNodeId is set
		if (OpcUa_IsGood(UaVariant(eventFieldList[i].EventFields[1]).toNodeId(newEvent.eventType)) && OpcUa_IsGood(UaVariant(eventFieldList[i].EventFields[14]).toNodeId(newEvent.conditionNodeId)))
		{
			// get rest of the event fields
			UaVariant(eventFieldList[i].EventFields[0]).toByteString(newEvent.eventId);
			UaVariant(eventFieldList[i].EventFields[1]).toNodeId(newEvent.eventType);
			newEvent.sourceName = UaVariant(eventFieldList[i].EventFields[2]).toString();
			UaVariant(eventFieldList[i].EventFields[3]).toDateTime(newEvent.time);
			UaVariant(eventFieldList[i].EventFields[4]).toLocalizedText(newEvent.message);
			UaVariant(eventFieldList[i].EventFields[5]).toUInt16(newEvent.severity);
			UaVariant(eventFieldList[i].EventFields[6]).toNodeId(newEvent.branchId);
			newEvent.conditionName = UaVariant(eventFieldList[i].EventFields[7]).toString();
			UaVariant(eventFieldList[i].EventFields[8]).toBool(newEvent.retain);
			UaVariant(eventFieldList[i].EventFields[9]).toBool(newEvent.ackedStateId);
			UaVariant(eventFieldList[i].EventFields[10]).toBool(newEvent.confirmedStateId);
			UaVariant(eventFieldList[i].EventFields[11]).toLocalizedText(newEvent.activeState);
			UaVariant(eventFieldList[i].EventFields[12]).toBool(newEvent.activeStateId);
			UaVariant(eventFieldList[i].EventFields[13]).toLocalizedText(newEvent.activeStateEffectiveDisplayName);
			UaVariant(eventFieldList[i].EventFields[14]).toNodeId(newEvent.conditionNodeId);
		
			for (OpcUa_UInt32 n = 0; n < 15; n++)
			{
				printf("EventFields[%d] value: [%s] \n", n, UaVariant(eventFieldList[i].EventFields[n]).toString().toUtf8());
			}

			printf("Event[%d] Message=%s SourceName=%s Severity=%d uvActive=%s uvAcked=%d \n",
				i,
				newEvent.message.toFullString().toUtf8(),
				newEvent.sourceName.toUtf8(),
				newEvent.severity,
				newEvent.activeState.toString().toUtf8(),
				newEvent.ackedStateId);
		}

		
	}
	printf("------------------------------------------------------------\n");
}

I did the code by example.It can receive the event. But the Message ITEM has no value.
As shown in figure：
[img]/Users/mac/Downloads/img.png[/img]

Can you help me see what the problem is？
Thank you!

[Support Team]

Hello zhu.li

this sounds like the server actually returns a valid message text which is "No text available (internal error)". So I assume you did everything correct in the client application.
Since the server returns that message you will only find the answer to your question on the server side.