Hi Jason. Are you using DAQmx Base? If so, you might want to view the KnowledgeBase linked below. If not, what version of LabVIEW PDA and LabVIEW are you using? Also, what PDA Operating System are you using? Usually this error is a result of the code you are using containing a LabVIEW feature that is not supported by the PDA module. For example, this error has often been seen when using tab controls incorrectly. You can find more information on what is not supported in LabVIEW PDA in LabVIEW Help, under PDA/TPC Module Reference.