Running server with xml file exported from Simatic for testing clients

[ChrisDAT20]

Hello,
I am new to OPC-UA and seem to struggle understanding how to properly run the server with an XML I got from a PLC engineer. He exported this file from his Simatic environment.
When I run the simple server example and add the .import_xml() function, the following error is thrown:

import logging
import asyncio
from asyncua import Server, ua

async def main():
    logging.basicConfig(level=logging.INFO)
    server = Server()
    # server.set_endpoint("opc.tcp://0.0.0.0:4840/freeopcua/server/")
    # server.set_server_name("FreeOpcUa Example Server")
    # set all possible endpoint policies for clients to connect through
    server.set_security_policy([
        ua.SecurityPolicyType.NoSecurity,
        ua.SecurityPolicyType.Basic256Sha256_SignAndEncrypt,
        ua.SecurityPolicyType.Basic256Sha256_Sign])
    await server.init()
    nodes1 = await server.import_xml("Opc.Ua.Di.NodeSet2.xml")
    nodes2 = await server.import_xml("PLC-export.xml")

    async with server:
        while True:
            await asyncio.sleep(1)

if __name__ == "__main__":
    asyncio.run(main())

INFO:asyncua.common.xmlimporter:Importing xml node (QualifiedName(NamespaceIndex=3, Name='REMOTE'), NodeId(Identifier=3066, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>)) as (QualifiedName(NamespaceIndex=3, Name='REMOTE') NodeId(Identifier=3066, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>))
WARNING:asyncua.common.xmlimporter:failure adding node NodeData(nodeid:NodeId(Identifier=3066, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>)) The parent node id does not to refer to a valid node.(BadParentNodeIdInvalid)
Traceback (most recent call last):
  File "C:\Users\user1\opcua\main.py", line 36, in <module>
    asyncio.run(main())
  File "C:\Users\user1\AppData\Local\Programs\Python\Python39\lib\asyncio\runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "C:\Users\user1\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 642, in run_until_complete
    return future.result()
  File "C:\Users\user1\opcua\main.py", line 23, in main
    nodes2 = await server.import_xml("PLC-export.xml")
  File "C:\Users\user1\opcua\venv\lib\site-packages\asyncua\server\server.py", line 725, in import_xml
    return await importer.import_xml(path, xmlstring)
  File "C:\Users\user1\opcua\venv\lib\site-packages\asyncua\common\xmlimporter.py", line 143, in import_xml
    node = await self._add_node_data(nodedata, no_namespace_migration=True)
  File "C:\Users\user1\opcua\venv\lib\site-packages\asyncua\common\xmlimporter.py", line 247, in _add_node_data
    node = await self.add_datatype(nodedata, no_namespace_migration)
  File "C:\Users\user1\opcua\venv\lib\site-packages\asyncua\common\xmlimporter.py", line 628, in add_datatype
    res[0].StatusCode.check()
  File "C:\Users\user1\opcua\venv\lib\site-packages\asyncua\ua\uatypes.py", line 375, in check
    raise UaStatusCodeError(self.value)
asyncua.ua.uaerrors._auto.BadParentNodeIdInvalid: The parent node id does not to refer to a valid node.(BadParentNodeIdInvalid)

The node in question does not have a parent node id:

  <UADataType NodeId="ns=1;i=3066" BrowseName="1:REMOTE">
    <DisplayName>REMOTE</DisplayName>
  </UADataType>

Are there more XML files to be imported first in order to provide all definitions for the Simatic XML file to be importable?
Or am I trying something which is not supposed to work at all?

Thanks a lot.

[schroeder-]

Simatic XML are not valid to the spec. Thats why we added a optional parameter to ignore errors in the nodes.
await server.import_xml("PLC-export.xml", strict_mode=False)

[ChrisDAT20]

ok, thank you for this hint. The import runs through and the server starts. I can too connect using UaExpert. However, I am not able to find any objects/variables from the Simatic XML. There are still lots of messages about parent nodes not found:

INFO:asyncua.common.xmlimporter:Importing XML file PLC-export.xml
INFO:asyncua.common.xmlimporter:namespace map: {1: 3, 2: 4}
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=1;i=3034'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=1;i=3036'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=1;i=3038'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=1;i=3033'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=1;i=3046'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=1;i=3047'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=1;i=3052'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=1;i=1004'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=2;i=1'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=2;i=2'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=2;i=3'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=2;i=4'
INFO:asyncua.common.xmlparser:Not implemented tag: <Element '{http://opcfoundation.org/UA/2011/03/UANodeSet.xsd}Extensions' at 0x00000274ED458C70>
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=2;i=5'
INFO:asyncua.common.xmlparser:Not implemented tag: <Element '{http://opcfoundation.org/UA/2011/03/UANodeSet.xsd}Extensions' at 0x00000274ED4589F0>
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=2;i=6'
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=2;i=7'
...
INFO:asyncua.common.xmlparser:Could not find parent for node 'ns=2;i=380'
INFO:asyncua.common.xmlparser:Not implemented tag: <Element '{http://opcfoundation.org/UA/2011/03/UANodeSet.xsd}Extensions' at 0x00000274EC7BE1D0>
WARNING:asyncua.common.xmlimporter:overwriting parent target NodeId(Identifier=6010, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>), shouldbe fixed NodeId(Identifier=1, NamespaceIndex=4, NodeIdType=<NodeIdType.Numeric: 2>) NodeId(Identifier=46, NamespaceIndex=0, NodeIdType=<NodeIdType.TwoByte: 0>) (NodeId(Identifier=1004, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>), NodeId(Identifier=46, NamespaceIndex=0, NodeIdType=<NodeIdType.TwoByte: 0>))
INFO:asyncua.common.xmlimporter:Importing xml node (QualifiedName(NamespaceIndex=3, Name='BYTE'), NodeId(Identifier=3001, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>)) as (QualifiedName(NamespaceIndex=3, Name='BYTE') NodeId(Identifier=3001, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>))
...
INFO:asyncua.common.xmlimporter:Importing xml node (QualifiedName(NamespaceIndex=3, Name='HW_IO'), NodeId(Identifier=3034, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>)) as (QualifiedName(NamespaceIndex=3, Name='HW_IO') NodeId(Identifier=3034, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>))
WARNING:asyncua.common.xmlimporter:failure adding node NodeData(nodeid:NodeId(Identifier=3034, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>)) The parent node id does not to refer to a valid node.(BadParentNodeIdInvalid)
INFO:asyncua.common.xmlimporter:Importing xml node (QualifiedName(NamespaceIndex=3, Name='HW_IOSYSTEM'), NodeId(Identifier=3035, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>)) as (QualifiedName(NamespaceIndex=3, Name='HW_IOSYSTEM') NodeId(Identifier=3035, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>))
WARNING:asyncua.common.xmlimporter:failure adding node NodeData(nodeid:NodeId(Identifier=3035, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>)) The parent node id does not to refer to a valid node.(BadParentNodeIdInvalid)
INFO:asyncua.common.xmlimporter:Importing xml node (QualifiedName(NamespaceIndex=3, Name='HW_MODULE'), NodeId(Identifier=3037, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>)) as (QualifiedName(NamespaceIndex=3, Name='HW_MODULE') NodeId(Identifier=3037, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>))
WARNING:asyncua.common.xmlimporter:failure adding node NodeData(nodeid:NodeId(Identifier=3037, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>)) The parent node id does not to refer to a valid node.(BadParentNodeIdInvalid)
INFO:asyncua.common.xmlimporter:Importing xml node (QualifiedName(NamespaceIndex=3, Name='HW_SUBMODULE'), NodeId(Identifier=3036, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>)) as (QualifiedName(NamespaceIndex=3, Name='HW_SUBMODULE') NodeId(Identifier=3036, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>))
WARNING:asyncua.common.xmlimporter:failure adding node NodeData(nodeid:NodeId(Identifier=3036, NamespaceIndex=3, NodeIdType=<NodeIdType.Numeric: 2>)) The parent node id does not to refer to a valid node.(BadParentNodeIdInvalid)
...
INFO:asyncua.common.xmlimporter:Importing xml node (QualifiedName(NamespaceIndex=3, Name='ServerInterfaces'), NodeId(Identifier='ServerInterfaces', NamespaceIndex=3, NodeIdType=<NodeIdType.String: 3>)) as (QualifiedName(NamespaceIndex=3, Name='ServerInterfaces') NodeId(Identifier='ServerInterfaces', NamespaceIndex=3, NodeIdType=<NodeIdType.String: 3>))

INFO:asyncua.common.xmlimporter:Importing xml node (QualifiedName(NamespaceIndex=4, Name='MFS'), NodeId(Identifier=1, NamespaceIndex=4, NodeIdType=<NodeIdType.Numeric: 2>)) as (QualifiedName(NamespaceIndex=4, Name='MFS') NodeId(Identifier=1, NamespaceIndex=4, NodeIdType=<NodeIdType.Numeric: 2>))
WARNING:asyncua.common.xmlimporter:failure adding node NodeData(nodeid:NodeId(Identifier=1, NamespaceIndex=4, NodeIdType=<NodeIdType.Numeric: 2>)) The parent node id does not to refer to a valid node.(BadParentNodeIdInvalid)

INFO:asyncua.common.xmlimporter:Importing xml node (QualifiedName(NamespaceIndex=0, Name='Default Binary'), NodeId(Identifier=3, NamespaceIndex=4, NodeIdType=<NodeIdType.Numeric: 2>)) as (QualifiedName(NamespaceIndex=0, Name='Default Binary') NodeId(Identifier=3, NamespaceIndex=4, NodeIdType=<NodeIdType.Numeric: 2>))
INFO:asyncua.common.xmlimporter:Importing xml node (QualifiedName(NamespaceIndex=0, Name='Default Binary'), NodeId(Identifier=7, NamespaceIndex=4, NodeIdType=<NodeIdType.Numeric: 2>)) as (QualifiedName(NamespaceIndex=0, Name='Default Binary') NodeId(Identifier=7, NamespaceIndex=4, NodeIdType=<NodeIdType.Numeric: 2>))
INFO:asyncua.common.xmlimporter:Importing xml node (QualifiedName(NamespaceIndex=4, Name='MFS_Rec_Auftragsdaten'), NodeId(Identifier=9, NamespaceIndex=4, NodeIdType=<NodeIdType.Numeric: 2>)) as (QualifiedName(NamespaceIndex=4, Name='MFS_Rec_Auftragsdaten') NodeId(Identifier=9, NamespaceIndex=4, NodeIdType=<NodeIdType.Numeric: 2>))
WARNING:asyncua.common.xmlimporter:failure adding node NodeData(nodeid:NodeId(Identifier=9, NamespaceIndex=4, NodeIdType=<NodeIdType.Numeric: 2>)) argument to node must be a NodeId object or a string defining a nodeid found None of type <class 'NoneType'>

The WARNINGs I can not really interpret, as there is no reference which parent node id is meant and which node id must be used as argument to node.

[Hytac]

Same problem in here, did you find any workaround?

[ChrisDAT20]

No, I did not continue with this topic.