Solution
This error means that you call 'Change baud rate.vi', which calls 'VISA Configure Serial Port (Instr).vi', where a property node is executed. The second argument of this Property Node (..at Property Node (arg 2)..) causes the error, because the stated value is not acceptable for the Property Node. However able to set this baud rate in device manager does not mean that all the participating code and devices can handle this.
You can try to resolve it by:
- Try to connect to the serial device using HyperTerminal with exactly the same parameters. If this succeeds, contact NI support for help. Else find another baud rate.
- Right-click to the Property Node and select 'Ignore errors inside Node' and test the code. If it works, this way you should safe 'VISA Configure Serial Port (Instr).vi' with a different name into your private project folder (for example as ' My VISA Configure Serial Port (Instr).vi').
If you are using NI-VISA 14 version with 3rd party hardware, consider upgrading to the latest compatible NI-VISA driver. This is a known issue for the NI-VISA 14 version which NI-VISA may return an error while setting the serial baud rate when using third-party serial drivers, even though setting this same baud rate may work in other third-party applications. This is due to how NI-VISA verifies baud rate settings.