Additional Information
This error generally occurs when a sound input device is connected to a PC after the LabVIEW environment has been loaded. LabVIEW only populates the sound device list upon startup when lvsound.llb or lvsound2.llb is loaded into memory.
As a workaround you can create a
subVI and call it dynamically. This should allow the library to re-populate when the subVI is called.