Invalid HDLC frame with Python

Hi. I want to Initiate an ImageTransfer on my meter by using your amazing Python library.
After running this code:

target = GXDLMSImageTransfer("0.0.44.0.0.255")
identification = "4410"
# Reading file data.bin with image
data = f.read()
# Initiating image transfer
target.imageTransferInitiate(open_and_close_connection.client, identification, len(data))
# Reading imageTransferStatus
GXDLMSReader.read(target, 6)

I get this exchange in console. Where frames with GetRequest to read Image Transfer Status have Invalid HDLC frame:

TX: 12:27:17 7E A0 13 02 21 61 93 CF 64 81 80 06 05 01 72 06 01 72 B5 F6 7E
RX: 12:27:17 7E A0 1F 61 02 21 73 E1 E2 81 80 12 05 01 72 06 01 72 07 04 00 00 00 01 08 04 00 00 00 01 25 36 7E
TX: 12:27:17 7E A0 4D 02 21 61 10 86 C6 E6 E6 00 60 3E A1 09 06 07 60 85 74 05 08 01 01 8A 02 07 80 8B 07 60 85 74 05 08 02 02 AC 12 80 10 A9 F2 EE 23 65 F1 A6 34 F9 D1 1C 8B E1 6D 1F 26 BE 10 04 0E 01 00 00 00 06 5F 1F 04 00 00 1E 5D FF FF 41 04 7E
RX: 12:27:17 7E A0 59 61 02 21 30 C4 68 E6 E7 00 61 4A A1 09 06 07 60 85 74 05 08 01 01 A2 03 02 01 00 A3 05 A1 03 02 01 0E 88 02 07 80 89 07 60 85 74 05 08 02 02 AA 12 80 10 1B 0D 86 43 21 10 88 C4 E2 71 B8 DC EE 77 3B 9D BE 10 04 0E 08 00 06 5F 1F 04 00 00 1E 1D 08 00 00 07 1D F1 7E
TX: 12:27:17 7E A0 2C 02 21 61 32 61 6E E6 E6 00 C3 01 C1 00 0F 00 00 28 00 00 FF 01 01 09 10 37 19 40 EE 23 B3 9F 92 54 94 A9 61 AC 9E BC 71 C4 89 7E
RX: 12:27:17 7E A0 25 61 02 21 52 13 4A E6 E7 00 C7 01 C1 00 01 00 09 10 88 BB 82 14 32 A2 BB 10 19 2C ED 77 DF 40 6D DA 80 3A 7E
TX: 12:27:17 7E A0 1A 02 21 61 76 08 85 E6 E6 00 C0 01 C1 00 12 00 00 2C 00 00 FF 06 00 1B D6 7E
RX: 12:27:18 7E A0 08 61 02 21 11 69 26 7E
TX: 12:27:18 7E A0 08 02 21 61 53 6F 51 7E
RX: 12:27:18 7E A0 1F 61 02 21 73 E1 E2 81 80 12 05 01 72 06 01 72 07 04 00 00 00 01 08 04 00 00 00 01 25 36 7E

Any feedback would be appriciated!