LV-muParser provides a simple LabVIEW API for muParser fast math expression parser. A modified version of muParser v2.3.4 is included. It will be installed to your "<LabVIEW>\resource" directory. I have added support for the "!" (not) operator as well as added ":" as a valid character for variable names. You will find the muParser API in the functions palette under "Addons > LAVA > muParser" muParser: https://beltoforion.de/en/muparser/ LV-muParser source on githu