MP9 File Extension

MP9 file icon
Multisim 9 Project Format
  • Developer
    National Instruments
  • Category
  • Popularity
    2.6 (5 votes)

What is MP9 file?

Full format name of files that use MP9 extension is Multisim 9 Project Format. National Instruments defined the Multisim 9 Project Format format standard. Files with MP9 extension may be used by programs distributed for Windows platform. Files with MP9 extension are categorized as CAD Files files. The CAD Files subset comprises 158 various file formats. Multisim is by far the most used program for working with MP9 files.

Programs which support MP9 file extension

Programs that can handle MP9 files are as follows. MP9 files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

Programs that support MP9 file

Windows Windows

How to open file with MP9 extension?

Being unable to open files with MP9 extension can be have various origins. Fortunately, most common problems with MP9 files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Get the Multisim

The main and most frequent cause precluding users form opening MP9 files is that no program that can handle MP9 files is installed on user’s system. The solution is straightforward, just download and install Multisim. On the top of the page a list that contains all programs grouped based on operating systems supported can be found. The safest method of downloading Multisim installed is by going to developer’s website () and downloading the software using provided links.

Step 2. Update Multisim to the latest version

If you already have Multisim installed on your systems and MP9 files are still not opened properly, check if you have the latest version of the software. Software developers may implement support for more modern file formats in updated versions of their products. The reason that Multisim cannot handle files with MP9 may be that the software is outdated. The latest version of Multisim should support all file formats that where compatible with older versions of the software.

Step 3. Set the default application to open MP9 files to Multisim

If you have the latest version of Multisim installed and the problem persists, select it as the default program to be used to manage MP9 on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Selecting the first-choice application in Windows

  • Choose the Open with entry from the file menu accessed by right-mouse clicking on the MP9 file
  • Select Choose another app → More apps
  • To finalize the process, select Look for another app on this PC entry and using the file explorer select the Multisim installation folder. Confirm by checking Always use this app to open MP9 files box and clicking OK button.

Selecting the first-choice application in Mac OS

  • From the drop-down menu, accessed by clicking the file with MP9 extension, select Information
  • Proceed to the Open with section. If its closed, click the title to access available options
  • Select the appropriate software and save your settings by clicking Change all
  • Finally, a This change will be applied to all files with MP9 extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Check the MP9 for 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 MP9 file. Being unable to access the file can be related to various issues.

1. The MP9 may be infected with malware – make sure to scan it with an antivirus tool.

If the MP9 is indeed infected, it is possible that the malware is blocking it from opening. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. MP9 file is infected with malware? Follow the steps suggested by your antivirus software.

2. Check whether the file is corrupted or damaged

If the MP9 file was sent to you by someone else, ask this person to resend the file to you. During the copy process of the file errors may occurred rendering the file incomplete or corrupted. This could be the source of encountered problems with the file. When downloading the file with MP9 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

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log in using an administrative account and see If this solves the problem.

4. Check whether your system can handle Multisim

The operating systems may note enough free resources to run the application that support MP9 files. Close all running programs and try opening the MP9 file.

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

Up-to-date system and drivers not only makes your computer more secure, but also may solve problems with Multisim 9 Project Format file. It is possible that one of the available system or driver updates may solve the problems with MP9 files affecting older versions of given software.

Do you want to help?

If you have additional information about the MP9 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 MP9 file.

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