Error while receiving from the COM port.Check plug is connected.

[MarcoYang]

Hi Sir,

Environment:
1. Platform:Braswell
2. CPU:N3060
3. Softwar:Win8 64-bits、BIT V8.1 Pro.(1016)
4. Super I/O" NCT6106D
5. Duty Cycle 100
5. RTS/CTS and DSR/DTR testing enabled
6. Send & receive timeout 3500ms
7. Port speed 115200Kbits/sec
8. Run six Com ports at the same time.
9. Tempture: 25 degree

My Question:
When I start Running, just only test TX/RX, that status look like PASS.
Maybe after 2hr or 5hr, I got an error that is "Error while receiving from the COM port.Check plug is connected" which randomly appear each Port.
When after appear that message, failed port is continue work normal.
I confirm my loopback is PASS.

So, could you give me some advice?
Thanks a lot.

[David (PassMark)]

Maybe the device driver for the serial port card crashed when under a long period of load?

[MarcoYang]

but when after appear that message, failed port is continue work normal.
I have no idea to check this problem, so what could I do?
I also test com port bear card is normal.

[MarcoYang]

When after appear that message, failed port is continue work normal.
I also test com port bear card which is PASS.
I have no idea to debug this issue, so I want to listen to your advice.
What experiment can I do?
Thanks.

[David (PassMark)]

In the preferences window there is an option to turn on Level 2 logging. There might be some additional information in the more detailed log.
Does the same thing happen if you test just 1 plug at a time?
Maybe it is a threading bug in the device driver?

[MarcoYang]

I test COM1 (IRQ 4) and COM2 (IRQ 3) at the same time, it look like fine.
I will get Level 2 logging of fail status for u.
What is principle of operation could cause this error of Error while receiving from the COM port.Check plug is connected?

[David (PassMark)]

The BurnInTest uses the Window API, which in turn uses the serial card's device driver. When a read request is made to the serial port and the driver reports an error, then you see this kind of error.