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VISA Serial error (-1073807298)

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I have a device that outputs data via RS232 approximately once per second.  The device has a built in FTDI FT232R chip to pretending to be USB.

 

At the moment I am trying to just read the data as it is streamed from the device, I know that the device is working correctly because I can open the serial port in PuTTY and see the data correctly.

 

However labview generates an IO error (-1073807298), only when the device is sending data.  If I turn off the device then Labview opens the port without issue then the VISA read times out as expected.  So Labview/VISA clearly has an issue with the data that is being transmitted.  The PuTTY log shows that there are NUL characters within the data which I think is the problem.

This is an extract from the log which shows the data being received.

Chrispbrown2255_1-1589798388726.png

 

I have spent the last 3 days reading knowledge base articles and through the forums, there has to be something simple I am missing.

 

The VI is attached, this is not going anywhere near the final project, I am just trying to read the serial data at this point.


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