There were some known issues related to installation dependencies of the NI-RIO legacy drivers that are specific to CentOS 7.x machines. These issues have been solved in the latest and currently supported NI-RIO drivers. To solve this problem, please go to the following article and follow the steps to install the latest NI-RIO drivers: Downloading and Installing NI Driver Software on Linux Desktop.Please install the latest driver version listed in the following link, and make sure it supports your device by checking the driver's readme file: NI Linux Device Drivers Download
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