Varieties of MAS Files

Principal MAS Type

.MAS

File ID:	.mas
Group:	rFactor Track File

Game file associated with rFactor, a racing simulation game. A MAS file stores files for both the structure and the appearance of the track.

Created by:	Image Space Incorporated
Division:	Game Files
Location:	HKEY_CLASSES_ROOT\.mas

Software Programs That Open The rFactor Track File:

Image Space rFactor by Image Space Incorporated

Windows

Additional MAS Files

.MAS

File ID:	.mas
Group:	MEGA Alignment Sequence File

A MAS File contains a binary representation of a genetic sequence alignment. It is used for performing additional analysis such as generating phylogenetic trees.

Created by:	Interscape
Division:	Data Files

Software Programs That Open MEGA Alignment Sequence File Files:

MEGA by Pennsylvania State University

Compatible with:

Windows

Mac

.MAS

File ID:	.mas
Group:	Access Stored Procedures

File associated with Microsoft Access, a database management system. A MAS File represents a pre-written procedure or query that is used by an Access database.

Created by:	Microsoft Corporation
Division:	Database Files

Software Programs That Open Access Stored Procedures Files:

Microsoft Access by Microsoft Corporation

Compatible with:

Windows

.MAS

File ID:	.mas
Group:	Lotus Freelance Graphics Smartmaster File

File was associated with Lotus Freelance Graphics, an information graphics and presentation software. This software is discontinued and MAS format is obsolete and no longer used.

Created by:	IBM
Division:	Uncommon Files

Software Programs That Open Lotus Freelance Graphics Smartmaster File Files:

Lotus Freelance Graphics by IBM

Compatible with:

Windows

.MAS

File ID:	.mas
Group:	WebFOCUS Master File Description

File associated with WebFOCUS, a business intelligence software used to create reports and analytics. MAS file contains master file description.

Created by:	Information Builders
Division:	Data Files

Software Programs That Open WebFOCUS Master File Description Files:

WebFOCUS by Information Builders

Compatible with:

Windows

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MAS Troubleshooting

Common MAS Opening Problems

Image Space rFactor Not Present

If you attempt to load your MAS file, you experience a message such as "Can't Open MAS Files". If so, it typically means that you don't have Image Space rFactor installed for %%os%%. This will prevent you from double-clicking to open the MAS file because the OS doesn’t know how to handle it.

Tip: If you don't have Image Space rFactor installed, and you know of another program to open your MAS file, you can try opening it by selecting from the programs listed under "Show Apps".

Incorrect Image Space rFactor Version

In other instances, your rFactor Track File file version may not be supported by your version of Image Space rFactor. Installing the latest version of Image Space rFactor from Image Space Incorporated is recommended. Your rFactor Track File file was probably created by a newer release of Image Space rFactor than what's currently installed your computer.

Tip: If you right-click on your MAS file, then select "Properties" (Windows) or "Get Info" (Mac), you can obtain hints about what version you need.

Ultimately, most of the difficulties opening MAS files are due to having the wrong version of Image Space rFactor installed.

Other Causes of MAS File Opening Problems

In the majority of cases, installing the right version of Image Space rFactor will resolve your issue. There can be other issues - unrelated to software - preventing you from opening MAS files. These other problems include (listed in order from most to least common):

• Corrupt Windows Registry file path references for MAS
• Corruption of the MAS file description inside the Registry
• Invalid installation of a MAS-associated program (eg. Image Space rFactor)
• Something has caused file corruption of your MAS
• Past or present virus infection has affected your MAS
• Hardware related to MASs has device driver corruption
• Insufficient system resources to successfully open rFactor Track File files