server.import_xml leading to BadParentNodeIdInvalid

[NNTin]

I took the server-minmal.py example and added the following line between line 12 and 13:

server.import_xml("absolute-path-of-my-xml-file.xml")

It works when importing Opc.Ua.Di.NodeSet2.xml.
But when I import Opc.Ua.Fdi5.NodeSet2.xml I am getting the following error:

failure adding node NodeData(nodeid:NumericNodeId(ns=1;i=2))
Traceback (most recent call last):
  File "Z:/Tin/python/experiment/server.py", line 13, in <module>
    server.import_xml("Z:/Tin/python/xml/Opc.Ua.Fdi5.NodeSet2.xml")
  File "Z:\python-opcua\opcua\server\server.py", line 523, in import_xml
    return importer.import_xml(path, xmlstring)
  File "Z:\python-opcua\opcua\common\xmlimporter.py", line 67, in import_xml
    node = self._add_node_data(nodedata)
  File "Z:\python-opcua\opcua\common\xmlimporter.py", line 88, in _add_node_data
    node = self.add_variable_type(nodedata)
  File "Z:\python-opcua\opcua\common\xmlimporter.py", line 340, in add_variable_type
    res[0].StatusCode.check()
  File "Z:\python-opcua\opcua\ua\uatypes.py", line 233, in check
    raise UaStatusCodeError(self.value)
opcua.ua.uaerrors._auto.BadParentNodeIdInvalid: The parent node id does not to refer to a valid node.(BadParentNodeIdInvalid)

When I remove the troubling node from the xml the error changes to:
failure adding node NodeData(nodeid:NumericNodeId(ns=1;i=2))

When removing that again it changes to: failure adding node NodeData(nodeid:NumericNodeId(ns=1;i=92))

and so on.

When I import Opc.Ua.NodeSet2.xml I am getting the following error:

AddNodesItem: Requested NodeId NumericNodeId(i=3062) already exists
failure adding node NodeData(nodeid:NumericNodeId(i=3062))
Traceback (most recent call last):
  File "Z:/Tin/python/experiment/server.py", line 13, in <module>
    server.import_xml("Z:/Tin/python/xml/Opc.Ua.NodeSet2.xml")
  File "Z:\python-opcua\opcua\server\server.py", line 523, in import_xml
    return importer.import_xml(path, xmlstring)
  File "Z:\python-opcua\opcua\common\xmlimporter.py", line 67, in import_xml
    node = self._add_node_data(nodedata)
  File "Z:\python-opcua\opcua\common\xmlimporter.py", line 82, in _add_node_data
    node = self.add_object(nodedata)
  File "Z:\python-opcua\opcua\common\xmlimporter.py", line 183, in add_object
    res[0].StatusCode.check()
  File "Z:\python-opcua\opcua\ua\uatypes.py", line 233, in check
    raise UaStatusCodeError(self.value)
opcua.ua.uaerrors._auto.BadNodeIdExists: The requested node id is already used by another node.(BadNodeIdExists)

I've been trying to figure out how I can import those xml files. I'm glad over any help.

[oroulet]

Not being able to import NodeSet2 is completely normal. It is already imported. Concerning the other one either it is a bug or it requires another nodeset before

[NNTin]

Thanks for clarifying regarding NodeSet2.

How would I import Opc.Ua.Fdi5.NodeSet2.xml?

In SiOME I would first import Opc.Ua.Di.NodeSet2.xml and then Opc.Ua.Fdi5.NodeSet2.xml.

When I do:

self.server.import_xml("Z:/Tin/python/xml/Opc.Ua.Di.NodeSet2.xml")
self.server.import_xml("Z:/Tin/python/xml/Opc.Ua.Fdi5.NodeSet2.xml")

I'm getting: The parent node id does not to refer to a valid node.(BadParentNodeIdInvalid)

Di.NodeSet2 is built on top of NodeSet2. Fdi5.Nodeset2 is built on top of Di.NodeSet2.

Is there a different method for importing multiple xmls?

[oroulet]

the code above is correct, might be a bug in importer.... you are welcome to try to find out. Unfortumately the code is hard to understand...If someone has ideas to improve it , it would be great...

[PrudhviRajC]

Hallo @NNTin, I am implementing the OPC UA Server and for that I want to import the XML file into it. When I import, I am also facing the same issue - "raise UaStatusCodeError(self.value) opcua.ua.uaerrors._auto.BadNodeIdExists: The requested node id is already used by another node.(BadNodeIdExists)".

Did you find any solution for this so far? Thank you

[oroulet]

BadNodeExist is clearly an issue with your setup or the XML file itself, not python-opcua code

[NNTin]

My error code was different. The solution to my error was to import both models into SiOME and then export it as a single xml file.

I don't know if this solves your problem. Best of luck!

edit:
The error we share was solved by this comment:

Not being able to import NodeSet2 is completely normal. It is already imported.

As in I didn't need to import NodeSet2.

[PrudhviRajC]

Sorry, I pasted the message wrong. Its "raise UaStatusCodeError(self.value) opcua.ua.uaerrors._auto.BadParentNodeIdInvalid: The parent node id does not to refer to a valid node.(BadParentNodeIdInvalid)"

[oroulet]

I just found and fixed two bugs in apcua-asyncio. they should be backported to python-opcua

https://github.com/FreeOpcUa/opcua-asyncio/commit/4b85a3f12242a59faf2cec01150e2124e7875d37 and https://github.com/FreeOpcUa/opcua-asyncio/commit/681bcd6230d936aa838a44f7eee09d76eef1713b

Can someone do it?

[oroulet]

BUT we now add a default reference type when no reference type is specified. I have no idea what the defalt should be. I used HasComponent, it might be wrong...

[anshi43]

Hello guys,

I am also getting the same error as yours : raise UaStatusCodeError(self.value) opcua.ua.uaerrors._auto.BadParentNodeIdInvalid: "The parent node id does not to refer to a valid node."(BadParentNodeIdInvalid)

i am trying to import all these files. custom_nodeset.xml was created using siemens SiOME modelling editor. here is the code :

import opcua

import time

from opcua import Server

import random

class OPCServer:

def init(self) :

self.server = Server()

def start(self):

self.server.set_server_name("OPC UA Server")

self.server.set_endpoint("opc.tcp://192.168.0.107:4140")

self.server.import_xml("Opc.Ua.Di.Nodeset2.xml")

self.server.import_xml("Opc.Ua.Machinery.Nodeset2.xml")

self.server.import_xml("Opc.Ua.Pumps.Nodeset2.xml")

self.server.import_xml("custom_nodeset.xml")

self.server.start()

if name == 'main':

server = OPCServer()

server.start()

server.run()

How did you guys solve this error? your comments and advice would be appreciated.

[schroeder-]

See #1475 . Switch to asyncua

[anshi43]

See #1475 . Switch to asyncua

i tried but the error remain same

[anshi43]

Sorry, I pasted the message wrong. Its "raise UaStatusCodeError(self.value) opcua.ua.uaerrors._auto.BadParentNodeIdInvalid: The parent node id does not to refer to a valid node.(BadParentNodeIdInvalid)"

did you find the solution because i am getting the same error ?

[AndreasHeine]

the error tells you that the parent already exist! the nodeset ia already part of the default addreassspace.

edit:

you should use asyncua instead of this repo its depricated!