Types of TFM Files

Main TFM Affiliation

.TFM

File Ext:	.tfm
Class:	TeX Font Metric File

A font file for typesetting fonts in LaTeX and TeX documents. It does not have font glyphs but has font information including width and the height of the glyphs needed by TeX typesetting and makes it possible to have a font in a separate file for being typeset in a TeX document.

Programmer:	Jonathan Kew and Stefan Löffler
Class:	Font Files
Folder:	HKEY_CLASSES_ROOT\.tfm

Software Programs That Open The TeX Font Metric File:

MiKTeX by Christian Schenk

Windows

TeXworks by Jonathan Kew and Stefan Löffler

Windows

Mac

Linux

Other TFM File Associations

.TFM

File Ext:	.tfm
Class:	Twins File Merger File

TheTFM file saves data used by Twins File Merger.

Programmer:	Twins Software
Class:	Data Files

Software Programs That Open Twins File Merger File Files:

Twins File Merger by Twins Software

Compatible with:

Windows

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Understanding TFM Issues

Issues Opening TFM Files

Missing MiKTeX

When you double-click your TFM file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". When this happens, it is commonly due to MiKTeX missing in %%os%%. The typical path of opening your TFM with a double-click won't work because %%os%% cannot make the program connection.

Tip: If you know of another program that can open your TFM file, you can try opening it by selecting the application from the programs listed.

MiKTeX is Out-of-Date

In other instances, your TeX Font Metric File file version may not be supported by your version of MiKTeX. If you do not have the proper version MiKTeX (or any of the other programs listed above), you may need to try downloading a different version of it, or one of the other software applications listed above. The primary cause of this problem is that your TeX Font Metric File file was created by a different (newer) version of MiKTeX than what's installed.

Tip: Find clues on the correct software version by right-clicking your TFM file and clicking "Properties".

Summary: Not having the right MiKTeX version on your computer can cause problems opening TFM files.

More Causes of Problems Opening TFMs

In the majority of cases, installing the right version of MiKTeX will resolve your issue. There can be other issues - unrelated to software - preventing you from opening TFM files. Issues that aren't software-related:

• Corrupt Windows Registry file path references for TFM
• The TFM file description within the Windows Registry was removed
• Defective install of a TFM program, such as MiKTeX
• Your TFM can't be loaded properly (file corruption)
• The TFM is infected with a virus
• TFM-related hardware has device drivers that obsolete
• Windows has inadequate resources to open your TeX Font Metric File file