Meter rejects reading multiple objects, but it conformance says it supports it.

Starting a new thread because i cannot answer in the previous topic:
https://gurux.fi/node/35252

Hello,
I'am trying to read multiple objects with 1 query via tcp/ip using python.

Running this code:

obj1 = GXDLMSRegister()
obj1.shortName = 39656
obj1.attributeIndex = 2

obj2 = GXDLMSRegister()
obj2.shortName = 39800
obj2.attributeIndex = 2

objects = [obj1, obj2]

packets = client.readList(objects)

for p in packets:
reply = send_and_receive(p)
client.getData(reply)

gives me an error:

packets = client.readList(objects)
File "C:\Python313\Lib\site-packages\gurux_dlms\GXDLMSClient.py", line 1255, in readList
raise ValueError(
"Meter doesn't support multiple objects reading with one request."
)

BUT when i connect to the reader using GURUXDLMS Director i get this:

Conformance:
Proposed:
Read, Write, UnconfirmedWrite, MultipleReferences, InformationReport, ParameterizedAccess

Negotiated:
Read, Write, MultipleReferences, ParameterizedAccess

So if i got MultipleReferences in Negotiated conformance i should be able to read multiple objects at once - right?

You asked me for hex trace so here it is:

21:28:20 DEBUG Sending SNRM
21:28:20 DEBUG Received UA: 7ea01e4103738e7f81801205018006013e07040000000108040000000107227e
21:28:20 DEBUG Translation:
<HDLC len="1D" >
<TargetAddress Value="20" />
<SourceAddress Value="1" />
<FrameType Value="73" />
<PDU>
<Ua>
<MaxInfoTX Value="128" />
<MaxInfoRX Value="62" />
<WindowSizeTX Value="1" />
<WindowSizeRX Value="1" />
</Ua></PDU>
</HDLC>

21:28:20 DEBUG Sending AARQ
21:28:20 DEBUG Received AARE: 7ea0374103302179e6e7006128a109060760857405080102a203020100a305a103020100be0f040d0800065f1f04001802200960fa000aa87e
21:28:20 DEBUG Translation:
<HDLC len="36" >
<TargetAddress Value="20" />
<SourceAddress Value="1" />
<FrameType Value="30" />
<PDU>
<AssociationResponse>
<ApplicationContextName Value="SN" />
<AssociationResult Value="00" />
<ResultSourceDiagnostic>
<ACSEServiceUser Value="00" />
</ResultSourceDiagnostic>
<InitiateResponse>
<NegotiatedDlmsVersionNumber Value="06" />
<NegotiatedConformance>
<ConformanceBit Name="Read" />
<ConformanceBit Name="Write" />
<ConformanceBit Name="MultipleReferences" />
<ConformanceBit Name="ParameterizedAccess" />
</NegotiatedConformance>
<NegotiatedMaxPduSize Value="0960" />
<VaaName Value="FA00" />
</InitiateResponse>
</AssociationResponse>
</PDU>
</HDLC>