Why the node can't be gotten?

[guolin]

Hello, Why I can't get the node in the override of aftaerStartup of MyBANodeManagerNodeSetXml, where I wan to add my variables to be historied.
UaNodeId(6025,,getNameSpaceIndex()) return a NULL node but acutually the node is existing in the xml based UANodeSet.

UaStatus MyBANodeManagerNodeSetXml::afterStartUp()
{
UaStatus ret;
m_pHistoryManager->pHistoryServerCapabilities()->setAccessHistoryDataCapability(OpcUa_True);
m_pHistoryManager->addVariableToHistorize(getNode(UaNodeId(6025,,getNameSpaceIndex())));
m_pHistoryManager->startUp(m_pServerManager);
return ret;
}


Thanks!
Guolin

[Support Team]

Hello Guolin,

the afterStartUp() method is called directly after the MyNodeManagerNodeSetXml is started.
After that the server loads the address space from the xml file. So the node does not exist jet when you try to add the node to historizing.
You could put the code to add a variable to historizing into the NodeManagerNodeSetXml::variableCreated().
The example in the DemoServer uses this mechanism to initialize certain values on variables - see MyNodeManagerNodeSetXml::variableCreated.

Best regards

Unified Automation Support Team

[guolin]

Thanks!

Now I do it in NodeManagerNodeSetXml::variableCreated(). while in HistoryManagerBuildingAutomation::startUp(), "dataMonitoredItems.m_createResult.isGood()" is not Good other than a "BadNodeIdUnknown".
The NodeId does really exist in the NodeSet.

What is the possible reason?