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Basic information about CM file

When there is a problem with opening files with the file extension CM（*.CM or *.cm）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the CM file yourself.

There are 2 file types using the CM file extension in our database. In the further part of this page, you will find detail information about all the CM file with their brief description and a list of programs that support CM file sorted by operating systems. The table below provides useful information about the CM file extension. It answers questions such as:
  • What is the CM file?
  • How to open a CM file?
  • What programs do I need to open a CM file?
  • What programs help to create and edit a CM file?
  • How to convert CM files to another file format?
  • How to convert another files to CM file format?


1.Detail information about CM file extension: CLEO Custom Mission

File type CLEO Custom Mission Category Game Files
Developer Rockstar Games File format N/A
Description CM file is a CLEO Custom Mission developed by Rockstar Games. Custom mission created for Grand Theft Auto: San Andreas (GTA SA); similar to a CLEO.CS file, but saved as a mission instead of a custom script; used for adding extra missions, or levels, to the game; may be created with Sanny Builder, a GTA mod utility.
Software programs that will open, edit or convert CM files

Windows		 Sanny Builder
Rockstar Games Grand Theft Auto: San Andreas
CLEO


2.Detail information about CM file extension: Cable Modem Configuration File

File type Cable Modem Configuration File Category Settings Files
Developer N/A File format N/A
Description CM file is a Cable Modem Configuration File.
Software programs that will open, edit or convert CM files

Windows		 Used by the cable modem

macOS
 Used by the cable modem



Can't open a CM file?

When you click a file to open it, operating system examines the filename extension. If operating system recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When operating system does not recognize a filename extension, you receive the following message:

”Can't open this file: example.CM”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the CM extension without any issue.


Where I can download the application that support CM file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of CM files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a CM file?

The reasons for the lack of the ability to open a CM file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a CM file. If there is still something wrong, you might want to check:

  • Whether the CM file is damaged.
  • Whether the CM file is incorrectly linked in the registry entries.
  • Whether the CM file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the CM file format is incompletely.
  • Whether the CM file is infected.
  • Whether the drivers of the equipment used for opening a CM file are up to date.
  • Whether your computer has enough hardware resources to open a CM file.

If the CM file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.