Archived:Error -200088 in SignalExpress

Updated May 1, 2024

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Reported In


  • cDAQ-9171


  • SignalExpress
  • Measurement & Automation Explorer (MAX)


  • NI-DAQmx

Issue Details

My SignalExpress project shows Error -200088 and I'm unable to acquire any data. If I try to configure my acquisition step, I can't find any devices or channels. SignalExpress is not showing measurements anymore.

Error -200088: Task specified is invalid or does not exist.


  1. Check that your device is powered on, and connected to your computer.
  2. Reset the NI MAX Database: How to Fix or Restore the NI MAX Database File
  3. After rebooting your computer, if you still get the error -200088 (or you're unable to find the NI MAX software in your computer), force reinstall the NI-DAQmx driver: Fix Corrupt or Non-Working NI Software with Force Reinstall
  4. Follow the guide Can't Find DAQ Device in Measurement & Automation Explorer (MAX) if the device is not recognized by your computer in NI MAX.

Additional Information

The NI-DAQmx driver can get corrupted for multiple reasons. Error -200088 refers to the software not being able to find the task in the NI MAX database, which can relate to: the database being corrupted, or the drivers are missing. If you changed to another computer and you just installed SignalExpress, it's possible you're missing the NI-DAQmx driver to work with your NI data acquisition devices.

NI will no longer release new versions of SignalExpress and DAQExpress software. The final versions for SignalExpress and DAQExpress are 2015 and 5.1 respectively. Users are encouraged to transition to the FlexLogger™ Lite edition, companion software for compatible DAQ hardware. FlexLogger Lite ensures comprehensive sensor compatibility, instant offline setup, and a programming-free interface for streamlined data logging. Download FlexLogger Lite to simplify data acquisition processes.