Error -201477 at DAQmx Start Task for DAQmx Watchdog Task

Updated Oct 21, 2025

Reported In

Software

  • LabVIEW

Driver

  • NI-DAQmx

Issue Details

I developed VI that used the DAQmx Watchdog, however I get error -201477 at DAQmx Start Task for DAQmx Watchdog Task when execute the code, how to resolve it.

Solution

The error indicate that reservation of watchdog timer task failed because another task is reserved or running. Please ensure the watchdog task start before the DAQ acquisition task start.

You may use the error cluster to control the code data flow or the sequence structure to ensure the execution order. Below is one of the example:

 

Related Links

How to Use and Implement the Watchdog Timer With NI-DAQmx

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