This article describes the fixes included in the update for NI-DAQmx 15.5.1. It will help you decide whether to upgrade.
NI-DAQmx 15.5.1 resolves a specific issue in which incorrect data is returned by multi-device tasks run on the NI cDAQ-9179 with certain module configurations.
While NI encourages all users to update drivers to the most recent versions whenever possible, this update is strongly recommended for cDAQ-9179 users. You can install the driver through Update Service, or you can download it directly from the page linked below.