Error -200022 or -200587 When Using NI DAQ Device

Updated Mar 20, 2023

Reported In

Hardware

CompactDAQ Chassis
Multifunction I/O Device

Software

Measurement & Automation Explorer (MAX)

Driver

NI-DAQmx

Issue Details

I am creating a DAQmx task in LabVIEW using a Test Panel for my DAQ device in Measurement & Automation Explorer (NI MAX) or running an application. When I try to start the task/application I get one of the following errors:

Error -200022: Resource requested by this task has already been reserved by a different task.

Error -200587: Requested operation could not be performed, because the specified digital lines are either reserved or the device is not present in NI-DAQmx.

Solution

This error occurs when a task is already running on the requested device or when a particular line (or channel) is already reserved on the device. To resolve the error, ensure the following:

Ensure there are no other DAQmx Tasks running while the VI is executing
- Utilize DAQmx clear and close functions to end the tasks as the application finishes executing.
- Close out of or stop any other tasks or Test Panels in NI MAX
Ensure concurrent tasks do not exceed the maximum number of tasks that the device can support.
- If you are using compactDAQ (cDAQ) refer to:
  - Number of Concurrent Tasks on a CompactDAQ Chassis Gen II
- If you are using a MIO DAQ device refer to:
  - Running DAQmx Tasks Simultaneously

Additional Information

If you are continuing to experience this error:

Try to reset the device through NI MAX or by using the DAQmx Reset Device VI

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