This content is not available in your preferred language.

The content is shown in another available language. Your browser may include features that can help translate the text.

Compile Linking Error 64-bit NI-DAQmx C Lib File Location

Updated Mar 27, 2025

Reported In

Driver

  • NI-DAQmx

Issue Details

I get linking errors when I try and develop a 64-bit NI-DAQmx application in C or C++.

Developing a 32-bit application works fine by linking to the .h and lib files found in: 
<Program Files (x86)>\National Instruments\NI-DAQ\DAQmx ANSI C Dev\lib\msvc

Solution

Using a 32-bit library file in a 64-bit program can cause linking errors. If your program works as a 32-bit application then the linking errors are most likely caused by linking to a 32-bit .lib file.

To resolve the linking errors, replace the references to 32 bit directory with reference to the 64 bit directory for NI-DAQmx.

The 64-bit NI-DAQmx C Lib File Location is:  
<Program Files (x86)>\National Instruments\Shared\ExternalCompilerSupport\C\lib64\msvc
​This is a native 64-bit library file and can be used in 64-bit C and C++ applications.

Additional Information

If you do not have this directory on your computer, make sure you selected to install ANSI C support when configuring a custom installation of the DAQmx driver.

Related Links

Other Support Options

Ask the NI Community

Collaborate with other users in our discussion forums



Request Support from an Engineer

A valid service agreement or active software subscription may be required, and support options vary by country.