You're here because you have a file that has a file extension ending in .mtz. Files with the file extension .mtz can only be launched by certain applications. It's possible that .mtz files are data files rather than documents or media, which means they're not meant to be viewed at all.

A compressed MetaStream scene file is integrated with compression specifications to reduce the size of the file for quicker and easier distribution. These distribution methods can be done through the Internet or with the use of optical media like DVDs and CDs among other external data storage devices, such as USB flash drives, memory cards and external hard disks. Classified as 3D image files, these compressed MetaStream scene files, prior to compression, are encoded in the binary format. The content of these compressed MetaStream scene files after the implementation of the compression specifications used for these 3D image files is converted into ASCII text format. XML-based standards are integrated into the text tags among other metadata details associated to the 3D scene stored in these compressed MetaStream scene files. Other pieces of data that may be stored in a compressed MetaStream scene file include hierarchies or structures and outlines of instances, global scene selections, camera details, animation configurations and certain bits of information associated to the 3D scene stored in these compressed MetaStream scene files. These compressed MetaStream scene files are affixed with the .mtz extension and are stored in the MTZ format.

Launch a .mtz file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .mtz file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .mtz files aren't yet associated with it. In this case, when you try to open a .mtz file, you can tell Windows which application is the correct one for that file. From then on, opening a  .mtz file will open the correct application. Click here to fix .mtz file association errors

Be careful not to rename the extension on .mtz files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

A file extension is the set of three or four characters at the end of a filename; in this case, .mtz. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.