Failed to receive reply

Hello,

reading association view is terminated by error message:
Failed to receive reply from the device in given time.
As i remember from distant past this function never was reliable. The meter type is Landis&Gyr E550, client id = 80 (Level 4). When I analyze logs i see that reading is terminated on this packet (please see last three packets):

[08:53:04:332] Written data (COM20)
7e a0 36 03 a1 b6 25 ab 08 01 ff 03 00 00 03 01 ~ 6.ˇ¶%«..˙.....
01 01 08 02 ff 03 00 00 03 01 01 01 08 03 ff 03 ....˙.........˙.
00 00 03 01 01 05 08 01 ff 03 00 00 03 01 01 05 ........˙.......
08 02 ff 03 00 72 58 7e ..˙..rX~
[08:53:04:410] Read data (COM20)
7e a8 4f a1 03 9a 6d 9f e6 e7 00 c4 03 c1 0a 00 ~¨Oˇ.šmźćç.Ä.Á..
02 02 0f 00 16 ff 00 02 02 0f 00 16 ff 00 02 02 .....˙......˙...
0f 00 16 ff 00 02 02 0f 00 16 ff 00 02 02 0f 00 ...˙......˙.....
16 ff 00 02 02 0f ff 16 1e 00 02 02 0f ff 16 1e .˙....˙......˙..
00 02 02 0f ff 16 1e 00 02 02 0f ff 16 20 36 52 ....˙......˙. 6R
7e ~
[08:53:04:623] Written data (COM20)
7e a0 19 03 a1 7c d9 ff e6 e6 00 c0 01 c1 00 07 ~ ..ˇ|Ů˙ćć.Ŕ.Á..
01 00 63 62 00 ff 03 00 f3 2c 7e ..cb.˙..ó,~
[08:53:09:644] Written data (COM20)
7e a0 19 03 a1 7c d9 ff e6 e6 00 c0 01 c1 00 07 ~ ..ˇ|Ů˙ćć.Ŕ.Á..
01 00 63 62 00 ff 03 00 f3 2c 7e ..cb.˙..ó,~
[08:53:14:707] Written data (COM20)
7e a0 19 03 a1 7c d9 ff e6 e6 00 c0 01 c1 00 07 ~ ..ˇ|Ů˙ćć.Ŕ.Á..
01 00 63 62 00 ff 03 00 f3 2c 7e ..cb.˙..ó,~

After parsing:
│ └──DLMS_PDU[192] {** getRequest **}
│ └──GetRequest[1] {** Get-request-normal **}
│ └──GetRequestNormal Sequence
│ ├──InvokeIdPriority
│ │ ├──InvokeID (0..3): 1
│ │ ├──ServiceClass (6): confirmed
│ │ └──Priority (7): high
│ ├──CosemAttributeDescriptor Sequence {** Cosem-Attribute-Descriptor **}
│ │ ├──CosemClassID = 7 (0x0007) {** Cosem-Class-Id **}
│ │ ├──CosemObjectInstanceID[6] = 1.0.99.98.0.255 {** Cosem-Object-Instance-Id **}
│ │ └──CosemObjectAttributeID = 3 {** Cosem-Object-Attribute-Id **}
│ └──Optional Flag = False {** Access-Selection **}

I have no problem reading load profile from my application as can be seen here:

[09:08:31:561] Written data (COM20)
7e a0 19 03 a1 54 93 52 e6 e6 00 c0 01 c1 00 07 ~ ..ˇT“Rćć.Ŕ.Á..
01 00 63 62 00 ff 03 00 f3 2c 7e ..cb.˙..ó,~
[09:08:31:670] Read data (COM20)
7e a8 5a a1 03 74 eb 3c e6 e7 00 c4 01 c1 00 01 ~¨Zˇ.të<ćç.Ä.Á..
05 02 04 12 00 08 09 06 00 00 01 00 00 ff 0f 02 .............˙..
12 00 00 02 04 12 00 03 09 06 00 00 60 f0 0c ff ............`đ.˙
0f 02 12 00 00 02 04 12 00 03 09 06 00 00 60 f0 ..............`đ
0c ff 0f 0c 12 00 00 02 04 12 00 03 09 06 00 00 .˙..............
60 f0 0c ff 0f 13 12 00 00 6d c2 7e `đ.˙.....mÂ~
[09:08:31:889] Written data (COM20)
7e a0 07 03 a1 71 df 49 7e ~ ..ˇqßI~
[09:08:32:108] Read data (COM20)
7e a0 1b a1 03 76 d5 4f 02 04 12 00 03 09 06 00 ~ .ˇ.vŐO........
00 61 61 00 ff 0f 02 12 00 00 68 d2 7e .aa.˙.....hŇ~

After parsing:
--- Packet 5 ---
DLMS_PDU[192] {** getRequest **}
└──GetRequest[1] {** Get-request-normal **}
└──GetRequestNormal Sequence
├──InvokeIdPriority
│ ├──InvokeID (0..3): 1
│ ├──ServiceClass (6): confirmed
│ └──Priority (7): high
├──CosemAttributeDescriptor Sequence {** Cosem-Attribute-Descriptor **}
│ ├──CosemClassID = 7 (0x0007) {** Cosem-Class-Id **}
│ ├──CosemObjectInstanceID[6] = 1.0.99.98.0.255 {** Cosem-Object-Instance-Id **}
│ └──CosemObjectAttributeID = 3 {** Cosem-Object-Attribute-Id **}
└──Optional Flag = False {** Access-Selection **}
--- Packet 6 ---
DLMS_PDU[196] {** GetResponse **}
└──GetResponse[1] {** Get-response-normal **}
└──GetResponseNormal Sequence
├──InvokeIdPriority
│ ├──InvokeID (0..3): 1
│ ├──ServiceClass (6): confirmed
│ └──Priority (7): high
└──GetDataResult Result[0] {** data **}
└──Data[1] {** Array **}
└──SequenceOf 5 Element(s)
├──0: Data[2] {** Structure **}
│ └──SequenceOf 4 Element(s)
│ ├──0: [18] Unsigned16 = 8 (0x0008)
│ ├──1: [9] OctetString[6] = 00 00 01 00 00 FF
│ ├──2: [15] Integer8 = 2 (0x02)
│ └──3: [18] Unsigned16 = 0 (0x0000)
├──1: Data[2] {** Structure **}
│ └──SequenceOf 4 Element(s)
│ ├──0: [18] Unsigned16 = 3 (0x0003)
│ ├──1: [9] OctetString[6] = 00 00 60 F0 0C FF
│ ├──2: [15] Integer8 = 2 (0x02)
│ └──3: [18] Unsigned16 = 0 (0x0000)
├──2: Data[2] {** Structure **}
│ └──SequenceOf 4 Element(s)
│ ├──0: [18] Unsigned16 = 3 (0x0003)
│ ├──1: [9] OctetString[6] = 00 00 60 F0 0C FF
│ ├──2: [15] Integer8 = 12 (0x0C)
│ └──3: [18] Unsigned16 = 0 (0x0000)
├──3: Data[2] {** Structure **}
│ └──SequenceOf 4 Element(s)
│ ├──0: [18] Unsigned16 = 3 (0x0003)
│ ├──1: [9] OctetString[6] = 00 00 60 F0 0C FF
│ ├──2: [15] Integer8 = 19 (0x13)
│ └──3: [18] Unsigned16 = 0 (0x0000)
└──4: Data[2] {** Structure **}
└──SequenceOf 4 Element(s)
├──0: [18] Unsigned16 = 3 (0x0003)
├──1: [9] OctetString[6] = 00 00 61 61 00 FF
├──2: [15] Integer8 = 2 (0x02)
└──3: [18] Unsigned16 = 0 (0x0000)

Timeout is set to 5 seconds.