Please let us know the USB Serial driver version and the firmware version that you are using.
Also, update the cyusbserial.dll file version to 184.108.40.206, which can be obtained from the USB-Serial SDK. Please refer to the below location for USB-Serial SDK.
We are using the DLL files from the SDK folder 'library\cyusbserial' with version 220.127.116.11. It seems to me that these files are meant for distribution, as it is available for x86 and x64 and comes with a header file. I have also found the DLL with version 18.104.22.168 you are referring to, but it seems to be a 32-bit build. As we have a 64 bit application, we cannot use it. Our application fails to start when we substitute 22.214.171.124 for 126.96.36.199.
I am not entirely sure what you mean by 'USB Serial driver version' and the 'firmware version', but I looked up the following
- driver version in windows device manager under 'Universal Serial Bus controllers': 188.8.131.52
- target version in serial configuration utility: 184.108.40.206
Sorry for my late response. I was expecting an email notification for any responses, but I didn't get one or I missed it.