ReadObject failed Register 1.0.1.7.0.255:2 Not enough memory available

Hi,

Every 5 secs, we read 6 registers from dlms meter (from L&T). Occasionally we
get "Not enough memory available" error:

If I close connection, com port and open again, it works. And then error
repeats after some time.
I also made following change in the code:
con_initializeBuffers(connection, 50 + 1024);

Below logs show successful packets, followed by error packets and then
successful packets after reconnect.

Please let me know how to fix the issue.

Thanks and Best regards,
Prakash

Read 21 bytes.
hex:[7e a0 13 41 03 fc fe 88 e6 e7 00 c4 01 c1 00 12 13 7e 03 94 7e ]
Read 23 bytes.
hex:[7e a0 15 41 03 1e 78 07 e6 e7 00 c4 01 c1 00 06 00 00 00 0e 03 f1 7e ]
Read 23 bytes.
hex:[7e a0 05 41 03 30 04 cf e6 e7 00 c4 01 c1 00 05 00 00 00 00 b1 05 7e ]

dlms data send failed. try to resend 1/3
Read 9 bytes.
hex:[7e a0 07 41 03 31 5a 24 7e ]
ReadObject failed Register 1.0.1.7.0.255:2 Not enough memory available.
com_readValue failed: 260

Read 21 bytes.
hex:[7e a0 13 41 03 52 8a c4 e6 e7 00 c4 01 c1 00 12 60 f7 66 57 7e ]
Invalid frame 52. Expected 30.

dlms data send failed. try to resend 1/3
Read 9 bytes.
hex:[7e a0 07 41 03 51 5c 47 7e ]
ReadObject failed Register 1.0.12.7.0.255:2 Not enough memory available.
com_readValue failed: 260

Read 21 bytes.
hex:[7e a0 13 41 03 74 be 80 e6 e7 00 c4 01 c1 00 12 61 15 a2 8a 7e ]
Invalid frame 74. Expected 30.

dlms data send failed. try to resend 1/3
Read 9 bytes.
hex:[7e a0 07 41 03 71 5e 66 7e ]
ReadObject failed Register 1.0.12.7.0.255:2 Not enough memory available.
com_readValue failed: 260

Read 21 bytes.
hex:[7e a0 13 41 03 96 a2 44 e6 e7 00 c4 01 c1 00 12 61 10 0f dd 7e ]
Invalid frame 96. Expected 30.

dlms data send failed. try to resend 1/3
Read 9 bytes.
hex:[7e a0 07 41 03 91 50 81 7e ]
ReadObject failed Register 1.0.12.7.0.255:2 Not enough memory available.
com_readValue failed: 260

Read 32 bytes.
hex:[7e a0 1e 41 03 73 8e 7f 81 80 12 05 01 80 06 01 80 07 04 00 00 00 01 08
04 00 00 00 01 53 3b 7e ]
reconnecting dlms meter
connecting to meter ...
InitializeConnection
Read 32 bytes.
hex:[7e a0 1e 41 03 73 8e 7f 81 80 12 05 01 80 06 01 80 07 04 00 00 00 01 08
04 00 00 00 01 53 3b 7e ]
Read 57 bytes.
hex:[7e a0 37 41 03 30 21 79 e6 e7 00 61 29 a1 09 06 07 60 85 74 05 08 01 01
a2 03 02 01 00 a3 05 a1 03 02 01 00 be 10 04 0e 08 00 06 5f 1f 04 00 00 10 14
02 00 00 07 bc 85 7e ]
connected to meter...
Read 21 bytes.
hex:[7e a0 13 41 03 52 8a c4 e6 e7 00 c4 01 c1 00 12 61 15 a2 8a 7e ]
Read 21 bytes.
hex:[7e a0 13 41 03 74 be 80 e6 e7 00 c4 01 c1 00 12 00 05 ae e6 7e ]
Read 20 bytes.
hex:[7e a0 12 41 03 96 19 58 e6 e7 00 c4 01 c1 00 0f 00 9a 42 7e ]
Read 21 bytes.