object list not get downloaded for firmware upgrade association

Dear kurumi,

Hope you are doing well.

Excited to become on forum after long time it's around 2.5 years.

I am developing indian standard and for that i have implemented firmware upgrade association but gurux gives error on object list downlow.

Error : Index was out of range. Must be non-negative and less than the size of the collection. Parameter Name: Index

Data Log:
12:10:50 Collecting objects
TX: 7E A0 1C 00 02 BA 69 A1 54 5D 6A E6 E6 00 C0 01 C1 00 0F 00 00 28 00 00 FF 02 00 91 53 7E
12:10:50
RX: 7E A0 7C A1 00 02 BA 69 74 FE 9D E6 E7 00 C4 02 C1 01 00 00 00 01 00 82 00 61 01 81 01 02 04 12 00 12 11 00 09 06 00 00 2C 00 00 FF 02 02 01 07 02 03 0F 01 16 01 00 02 03 0F 02 16 01 00 02 03 0F 03 16 01 00 02 03 0F 04 16 01 00 02 03 0F 05 16 03 00 02 03 0F 06 16 01 00 02 03 0F 07 16 01 00 01 04 02 02 0F 01 16 01 02 02 0F 02 16 01 02 02 0F 03 16 01 02 02 0F 04 16 01 AA 9D 7E

it has only one object to download.

I have analyzed the received data from meter it looks just fine.

also, frame is decoded by gurux "DLMS Translator"

also i have tested the same with kalkitech where object list get downloaded successfully with same log.

could you please help to fix this issue.

Best Regards,
Aoudumbar Pawar