[Bug][OPC-UA]: Can't read array of structures

[alegue87]

What happened?

Hello,

i'm trying to read an array of simple structure ( Range type ) in opcua with this query string: ns=2;s=range;STRING This is a view with opcua-expert:

Following the code the array of length 10 elements is present ( itemCount = 10 ) and the Range class in package org.apache.plc4x.java.opcua.readwrite is created and ready.

The exception

Caused by: org.apache.plc4x.java.api.exceptions.PlcRuntimeException: org.apache.plc4x.java.spi.generation.ParseException: Unsupported case for discriminated type parameters [VariantType=0 arrayLengthSpecified=false]

is raised when plc4x try to instantiate a builder from the identifierType ( not extracted from readBuffer)

where is the error?

thanks for any reply

Version

v0.10.0, v0.11.0

Programming Languages

• [X] plc4j
• [ ] plc4go
• [ ] plc4c
• [ ] plc4net

Protocols

• [ ] AB-Ethernet
• [ ] ADS /AMS
• [ ] BACnet/IP
• [ ] CANopen
• [ ] DeltaV
• [ ] DF1
• [ ] EtherNet/IP
• [ ] Firmata
• [ ] KNXnet/IP
• [ ] Modbus
• [X] OPC-UA
• [ ] S7

[splatch]

Hello @alegue87, thank you for reporting bug and coming with interesting case!

While I might be wrong, it looks like combination of several aspects - the custom type combined with (probably) unbounded array. Would you be able to provide a pcap capture with OPC UA packet containing this answer? I would like to see how data is encoded to check if we can detect it in any way and align to base type. The VariantType 0 is null, which is obviously not available in screen you showed.

If you have a possibility to provide prosys simulation server project I'll also be able to repeat it.

[splatch]

Hello @alegue87, can you post some wireshark capture so we can verify frame decoding? Also, please give a try to PLC4X 0.12 which was released recently.

[splatch]

Closed due to inactivity and missing input.