Varieties of MPP Files

Main MPP Affiliation

.MPP

File Name:	.mpp
Category:	Microsoft Project File

An MPP file is a project created by the program Microsoft Project, basically, a management program that helps you organize, track, and maintain projects. It is the main file type associated with the program.

Created by:	Microsoft Corporation
Class:	Data Files
Key:	HKEY_CLASSES_ROOT\.mpp

Software Programs That Open The Microsoft Project File:

Serena OpenProj by Serena

Windows

Mac

Linux

Microsoft Project 2016 by Microsoft Corporation

Windows

Stand By Soft RationalPlan by RationalPlan

Windows

Mac

Linux

Seavus Project Viewer by Seavus

Windows

	Mac
	iOS

Web

Project Viewer 365 by Housatonic

	Windows
	Windows Phone

	Mac
	iOS

Android

Web

LiveProject by KaDonk

Windows

MOOS Project Viewer by Stand By Soft

Windows

Mac

Linux

Steelray Project Viewer by Steelray Software

Windows

Mac

Linux

MPXJ by Packwood Software

Mac

Linux

ProjectManager.com by ProjectManager.com

Web

Other MPP File Associations

.MPP

File Name:	.mpp
Category:	Atari ST Multi-Palette Picture

Files with MPP file extension is related to the Atari ST computers with the TOS operating system. These files contain a multi-palette picture from Atari ST computers.

Created by:	Atari Corporation
Class:	Vector Image Files

Software Programs That Open Atari ST Multi-Palette Picture Files:

Recoil by Piotr Fusik

Compatible with:

Windows

	Mac
	Apple II

Android

Linux

Atari TOS

.MPP

File Name:	.mpp
Category:	MobileFrame Project Publisher File

An MPP file may also be a file created by the MobileFrame Desktop, the MobileFrame mobile application projects and deployments tool. It may contain MobileFrame projects and is used for saving all of the projects in one archive.

Created by:	MobileFrame
Class:	Data Files

Software Programs That Open MobileFrame Project Publisher File Files:

MobileFrame Desktop by MobileFrame

Compatible with:

Windows

Mac

Linux

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Understanding MPP Issues

Common MPP Opening Problems

Missing Serena OpenProj

When trying to open your MPP file, you get the error "Can't Open MPP File Type". When this happens, it is commonly due to Serena OpenProj missing in %%os%%. This will prevent you from double-clicking to open the MPP file because the OS doesn’t know how to handle it.

Tip: Another MPP-related program can be selected to open the file by clicking "Show Apps" and finding the application.

Wrong Version of Serena OpenProj is Installed

It is possible that your version of Serena OpenProj isn't able to open your Microsoft Project File file due to incompatibility. Installing the latest version of Serena OpenProj from Serena is recommended. This issue mainly occurs when your Microsoft Project File file was created by a newer version of Serena OpenProj than you have on your PC.

Tip: Investigate your MPP file by right-clicking and selecting "Properties" to find clues on what version you need.

Ultimately, most of the difficulties opening MPP files are due to having the wrong version of Serena OpenProj installed.

Other MPP File Opening Causes

In the majority of cases, installing the right version of Serena OpenProj will resolve your issue. There can be other issues - unrelated to software - preventing you from opening MPP files. These issues include:

• Invalid MPP file references in the Windows Registry (the "phonebook" of the Windows Operating System)
• The MPP file description within the Windows Registry was removed
• Serena OpenProj or another MPP application experienced a flawed installation
• MPP file corruption
• Past or present virus infection has affected your MPP
• Device drivers of the hardware associated with your MPP file are corrupt or out-of-date
• Your computer does not have the adequate system resources to open the Microsoft Project File format