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NiDaqmx x64 throws AccessviolationException

"We have installed the DAQmx driver version 25 Q4 Patch 1. When we set the build configuration to x64 in Visual Studio 2026 (with 'Prefer 32-bit' disabled), an AccessViolationException is thrown whenever we attempt to create a linear scaling.

This occurs, for example, when calling: NationalInstruments.DAQmx.Api.Internal.Native.DAQmxCreateLinScale(Byte[] name, Double slope, Double yIntercept, UnitsPreScaled preScaledUnits, Byte[] scaledUnits)

Environment Details:

  • Driver Version: NI-DAQmx 25 Q4 Patch 1

  • NI-DAQmx DLL Version: 25.8.45.49155"

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