Problem in decoding an OPC UA Pubsub NetworkMessage|OPC UA Standard|Forum|OPC Foundation

I have to parse an OPC UA Pubsub NetworkMessage as described in https://reference.opcfoundatio…..cs/7.2.4.4

 

 

The message I get via MQTT is (in hex):

 

 

 

In partucular I found out:

 

>d1 Version/Flag      1101 0001   PublisherId enabled, 

                                                GroupHeader disabled , 

                                                Payloadheader enabled, 

                                                ExtendedFlags1 enabled

 

 

 

>04      extendedFlags1    0000 0100            PublisherId is of DataType String, 

                                                                 DataSetClassId disabled, 

                                                                 SecurityHeader disabled, 

                                                                 Timestamp disabled, 

                                                                 PicoSeconds disabled, 

                                                                 ExtendedFlags2 disabled

 

so we continue with PublisherId of type string:

 

 

 

>1e000000 length of publisher Id = 30 Byte

 

The publisherId is

 

>41383030305f4350383035785f454753315f474632343036353037383232

 

DataSetClassId is disabled, GroupHeader disabled ->

Next should be: PayloadHeader for DataSetMessage https://reference.opcfoundatio…..cs/7.2.4.5

 

 

>01    messageCount = 1

 

 

>e803   DataSetWriterId[0]

 

 

 

NOW THE PROBLEM:

 

timestamp disabled, picoseconds disabled, no promoted fields , no security header

-> next should be payload. Since we have payload https://reference.opcfoundation.org/Core/Part14/v105/docs/7.2.4.5

 

payload starts with sizes[0]: List of byte sizes of the DataSetMessages.

 

 

>eb01 16 Bit Uint16 = 491   size of first DataSetMessage(and only)

 

AT THIS STAGE there must already be something wrong, because there are only 30 remaining bytes and size cannot be 491!!! 

 

 

6a06f01f5b2ff01f5b2f010019000000080030844e9ea78edb01906e6d43

 

 

Where is the problem in my decoding?