VI File Extension

What is VI file?

Files with the extension VI belong to the category of virtual instrument files.

What do VI files contain?

Contents of files with the extension VI are virtual instruments, used in the programming environment called LabVIEW. This environment enables the generation and manipulation of applications that simulate the operation of real laboratory instruments such as a multimeter or an oscilloscope. Each file with the VI extension contains two sections, in which are respectively: a graphical source code of the application written in G language and its compiled version. In the first section, one can distinguish:

• user interface,
• block diagram, which contains G language sources,
• data space,
• connector pane,
• icon, which is used for graphical presentation of the instrument from the VI file in the LabVIEW block diagram.

The compiled source code version, stored in the second section of the VI file, serves to run the virtual instrument in the LabVIEW environment.

What are VI files used for?

Virtual instruments, stored in files with the extension VI, are used to conduct research and measurements without the need for physical construction of the analyzed systems. In this way, they have been used since the 80s of the last century in the industry and during the design of even very advanced devices (including use by NASA).

Can I create my own VI files?

The programming environment named LabVIEW allows for the visual creation of new or modification of existing virtual instruments, stored in files with the extension VI. This is practically achieved in such a way that the user modifies the graphical content of the VI file, written in a dedicated programming language, and the LabVIEW environment automatically compiles the modified source code and saves its compiled version to the same VI file, allowing the operation and use of the new virtual instrument.

Programs which support VI file extension

Below you will find an index of software programs that can be used to open VI files divided into 3 categories according to system platform supported. Files with VI suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.

Updated: 03/01/2024

How to open file with VI extension?

Being unable to open files with VI extension can be have various origins. What is important, all common issues related to files with VI extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. We have prepared a listing of which will help you resolve your problems with VI files.

Step 1. Install LabVIEW software

The most common reason for such problems is the lack of proper applications that supports VI files installed on the system. The solution to this problem is very simple. Download LabVIEW and install it on your device. The full list of programs grouped by operating systems can be found above. One of the most risk-free method of downloading software is using links provided by official distributors. Visit LabVIEW website and download the installer.

Step 2. Update LabVIEW to the latest version

If the problems with opening VI files still occur even after installing LabVIEW, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of LabVIEW is available. Software developers may implement support for more modern file formats in updated versions of their products. If you have an older version of LabVIEW installed, it may not support VI format. The most recent version of LabVIEW is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Associate LabVIEW Virtual Instrument Format files with LabVIEW

After installing LabVIEW (the most recent version) make sure that it is set as the default application to open VI files. The method is quite simple and varies little across operating systems.

The procedure to change the default program in Windows

• Choose the Open with entry from the file menu accessed by right-mouse clicking on the VI file
• Select Choose another app → More apps
• The last step is to select Look for another app on this PC option supply the directory path to the folder where LabVIEW is installed. Now all that is left is to confirm your choice by selecting Always use this app to open VI files and clicking OK.

The procedure to change the default program in Mac OS

• From the drop-down menu, accessed by clicking the file with VI extension, select Information
• Open the Open with section by clicking its name
• Select LabVIEW and click Change for all...
• Finally, a This change will be applied to all files with VI extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Ensure that the VI file is complete and free of errors

You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper VI file. Being unable to access the file can be related to various issues.

1. Verify that the VI in question is not infected with a computer virus

Should it happed that the VI is infected with a virus, this may be that cause that prevents you from accessing it. Scan the VI file as well as your computer for malware or viruses. If the VI file is indeed infected follow the instructions below.

2. Check whether the file is corrupted or damaged

Did you receive the VI file in question from a different person? Ask him/her to send it one more time. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. When downloading the file with VI extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Verify whether your account has administrative rights

Some files require elevated access rights to open them. Switch to an account that has required privileges and try opening the LabVIEW Virtual Instrument Format file again.

4. Verify that your device fulfills the requirements to be able to open LabVIEW

The operating systems may note enough free resources to run the application that support VI files. Close all running programs and try opening the VI file.

5. Verify that your operating system and drivers are up to date

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with LabVIEW Virtual Instrument Format files. Outdated drivers or software may have caused the inability to use a peripheral device needed to handle VI files.

Do you want to help?

If you have additional information about the VI file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on VI file.