We have identified an issue with NI-DAQmx that was introduced in version 9.1 and remained through 9.2.1. When certain USB human interface devices (HID) such as keyboards, mice, printers, and so on are connected to the PC, some NI devices will no longer be detected by the NI-DAQmx driver.
When these USB devices, including common HP and Apple keyboards and mice, NI-DAQmx sees these devices as NI-DAQmx devices and adds them to the MAX database. When this happens, it can cause the database to no longer be usable by DAQmx. As a result, the main symptom of this issue is being unable to see your devices in Measurement & Automation Explorer.
This issue will be corrected in NI-DAQmx 9.2.2. We will also be releasing NI-DAQmx 9.1.7 that includes the fix, for those who wish to minimize upgrade risks. Alternatively, we are making patches available that will fix the issue for NI-DAQmx versions 9.1, 9.1.1, 9.1.5, 9.1.6, 9.2, and 9.2.1. We recommend that all users apply this fix.
