Cannot Detect Devices in FlexLogger

Updated Jan 26, 2024

Reported In


  • CompactDAQ Chassis


  • FlexLogger

Issue Details

When I open a FlexLogger project, it cannot find my CompactDAQ (cDAQ) chassis, other NI hardware, or I get a No Device(s) Detected error message:
No Device(s) Detected


The issue of FlexLogger not detecting NI hardware can be due to different causes: Driver issues, incompatibility between the hardware and FlexLogger, antivirus software blocking the communication, and incorrect licensing are some of the potential causes for this error. Follow the next steps to try to solve this issue.
  • Ensure that your hardware is supported in the version of FlexLogger you are using.
  • Verify that you can see your device in NI MAX. If the device is not being recognized by NI MAX, try the following troubleshooting guides to try to gain connection with the device:
  • It has been reported that some antivirus software, such as SentinelOne, or firewalls can block the communication between your DAQ device and FlexLogger. You can check that this is not the case by temporarily disabling the antivirus and/or firewall. 
    • If disabling the antivirus is not an option for you, speak to your IT department to go through the application logs to find the event that listed the antivirus as stopping FlexLogger from running. From this list, you can create an exclusion within the antivirus software. 
    • Contact the antivirus/firewall provider for further assistance on how to configure exceptions. For example, in SentinelOne there are different exclusions modes that can change the level of interaction and restriction imposed in a specific path.
  • Check if there are any Services in Windows related to NI that are stopped or different from 'Running'. If so, try restarting the stopped services and relaunch FlexLogger.
  • Check that FlexLogger is correctly licensed in the NI License Manager. Try deactivating and re-activating the FlexLogger license. If you are using a trial license of FlexLogger, contact NI Support to get a temporary activation code if none of the steps above fix the issue.
  • If you can see the device in NI MAX, reinstall FlexLogger or install a different version. For more information on how to install NI software visit: Installing, Updating, Repairing, and Removing NI Software.