PXIe R Series devices should automatically synchronize to backplane PXIe_CLK100 clock. As of R Series Multifunction RIO 15.0.0, PXIe R Series devices do not synchronize to the backplane PXIe_CLK100 clock and may drift from it over time. This issue affects all PXIe R Series device users requiring synchronization with the backplane clock or other devices in the PXIe chassis.
This patch updates a component distributed by R Series Multifunction RIO 15.0.0, 15.5.0, 16.0.0, 17.0.0, 17.0.1, 18.0.0, or 18.5.0. You must have at least one of these products installed before you can apply this patch. Refer to the corresponding readme for system requirements and supported operating systems: NI R Series Multifunction RIO
After you have at least one of the indicated products installed, NI Update Service will allow you to download and install the NI R Series Multifunction RIO Device Drivers Q1 2019 Patch. The patch is also available from ni.com/downloads.
Note: The Q1 2019 fix can be used by LabVIEW 2015 SP1, 2016, 2017 SP1, and LabVIEW 2018 SP1 users.