NI VISA Error -1073807360

[gargrahul]

Hi,

I'm trying to connect with a relay board connected to desktop through USB Cable. The COM Generated(COM 6) can be seen in the device manager. But when i use VISA Open VI it generates Error -1073807360  VISA (Hex 0xBFFF0000) Unknown System Error (Miscellaneous Error).

If i remove and reconnect the USB then only it works.

I'm using Windows OS 11. The application is running as exe. Correct Runtimes are installed. I'm able to communicate with USB but only when i remove and reconnect the USB Cable.

Does anyone know the solution for it so that it works normally without having to remove and reconnect the USB Cable.

[RTSLVU · Accepted solution]

Sounds like an issue with the virtual com port driver that came with the device.

I don't think there is a LabVIEW fix for it. Have you tried contacting the manufacturer for an updated VCP driver? 

[rolfk]

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@RTSLVU wrote:

Sounds like an issue with the virtual com port driver that came with the device.

I don't think there is a LabVIEW fix for it. Have you tried contacting the manufacturer for an updated VCP driver? 

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Considering the cost of these devices, the cheapest solution is usually to try a different one, which you got from a reliable source. Alibaba hardware may be cheap but the manufacturer often tries to use chips that claim to be compatible to FTDI or some other such well recognized company, hoping to avoid having to develop their own Windows device driver, but FTDI obviously doesn't like that and does absolutely no effort to make their drivers compatible with such copy cat products. In fact they go to some effort to detect such hardware and simply refuse to communicate with it, returning an error during some of the setup routines.

[gargrahul]

It required a CH340 driver which I had already installed.

I tried again by installing the latest one for Windows 11 and it is working now.