In the following image the standard output indicator will populate when the System Exec VI has finished running. Is there any way to asynchronously poll the STD Out of the command window to monitor the status as it is running? I have run into this limitation a few times and not have been able to figure it out.
The system exec vi is just like any other VI in that the output is only available after execution is completed. If you want more control over the functionality of a call, look at using .NET. There is some useful information here: