MPJ File Extension

What is MPJ file?

Files with the extension .MPJ contain an HTML documentation project created in older versions of Adobe RoboHelp. In the software, help files of any type can be saved with the extension .HHP. The RoboHelp software, a type of HAT - help authoring tool, was developed by eHelp Corporation, and its continuation is now being created by Adobe Systems.

What does the MPJ file contain?

Files include the design of help documents, a knowledge base for various types of software. They are used to generate complete manuals that facilitate the use of applications. An MPJ project may include:

• Table of contents,
• Information sources for the project,
• Help information, instructions written in a structured way,
• Indexes enabling quick searching of helpful contents,
• Project properties, for example, title, language.

The MPJ format is supported by older versions of the RoboHelp software, its successor is .XPJ, based on the XML format. However, newer versions of RoboHelp provide support for the older MPJ format.

MPJ files - how are they used?

Projects of help content, e-learning resources, organizational policies, and knowledge base articles can be saved to files. An Adobe RoboHelp Project File may also be of type WebHelp, HTML Help, JavaHelp, Oracle Help, or FlashHelp Pro. However, this format is no longer commonly used. Based on a completed MPJ project, a finished documentation can be generated or exported to another, newer format, .XPJ.

Programs which support MPJ file extension

The list that follows enumerates programs compatible with MPJ files, divided into 2 categories based on operating system on which they are available. MPJ files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

Updated: 03/22/2024

How to open file with MPJ extension?

There can be multiple causes why you have problems with opening MPJ files on given system. Fortunately, most common problems with MPJ files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The list below will guide you through the process of addressing the encountered problem.

Step 1. Install Adobe RoboHelp software

The most common reason for such problems is the lack of proper applications that supports MPJ files installed on the system. The solution is straightforward, just download and install Adobe RoboHelp. Above you will find a complete listing of programs that support MPJ files, classified according to system platforms for which they are available. If you want to download Adobe RoboHelp installer in the most secured manner, we suggest you visit Adobe Systems Incorporated website and download from their official repositories.

Step 2. Check the version of Adobe RoboHelp and update if needed

You still cannot access MPJ files although Adobe RoboHelp is installed on your system? Make sure that the software is up to date. It may also happen that software creators by updating their applications add compatibility with other, newer file formats. The reason that Adobe RoboHelp cannot handle files with MPJ may be that the software is outdated. The most recent version of Adobe RoboHelp is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Set the default application to open MPJ files to Adobe RoboHelp

If the issue has not been solved in the previous step, you should associate MPJ files with latest version of Adobe RoboHelp you have installed on your device. The next step should pose no problems. The procedure is straightforward and largely system-independent

Change the default application in Windows

• Clicking the MPJ with right mouse button will bring a menu from which you should select the Open with option
• Click Choose another app and then select More apps option
• To finalize the process, select Look for another app on this PC entry and using the file explorer select the Adobe RoboHelp installation folder. Confirm by checking Always use this app to open MPJ files box and clicking OK button.

Change the default application in Mac OS

• By clicking right mouse button on the selected MPJ file open the file menu and choose Information
• Find the Open with option – click the title if its hidden
• Select the appropriate software and save your settings by clicking Change all
• A message window should appear informing that This change will be applied to all files with MPJ extension. By clicking Continue you confirm your selection.

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

If you followed the instructions form the previous steps yet the issue is still not solved, you should verify the MPJ file in question. Being unable to access the file can be related to various issues.

1. Check the MPJ file for viruses or malware

If the MPJ is indeed infected, it is possible that the malware is blocking it from opening. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. MPJ file is infected with malware? Follow the steps suggested by your antivirus software.

2. Check whether the file is corrupted or damaged

Did you receive the MPJ 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. It could happen the the download process of file with MPJ extension was interrupted and the file data is defective. Download the file again from the same source.

3. Ensure that you have appropriate access rights

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Switch to an account that has required privileges and try opening the RoboHelp HTML Project file again.

4. Make sure that the system has sufficient resources to run Adobe RoboHelp

If the system is under havy load, it may not be able to handle the program that you use to open files with MPJ extension. In this case close the other applications.

5. Ensure that you have the latest drivers and system updates and patches installed

Latest versions of programs and drivers may help you solve problems with RoboHelp HTML Project files and ensure security of your device and operating system. Outdated drivers or software may have caused the inability to use a peripheral device needed to handle MPJ files.

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