Sorts of TDT Files

Leading TDT Type

.TDT

Formatting:	.tdt
Category:	AVCHD Thumbnail File

A file made by Sony and Panasonic digital camcorders. It has thumbnail stills of video recorded in the Advanced Video Coding High Definition (AVCHD) format. It appears in a folder after connecting the camcorder to a computer and its not meant to be opened manually.

Company:	Sony
Division:	Video Files
Registry Key:	HKEY_CLASSES_ROOT\.tdt

Software Programs That Open The AVCHD Thumbnail File:

Unknown Software by Unknown Developer

Windows

More TDT Files

.TDT

Formatting:	.tdt
Category:	FirstBreak Concrete Test File

Data file saved test results generated by FirstBreak, an application for testing the strengths of concrete mixes. TDT files saved concrete content, temperature, test specimen strength and other test data.

Company:	Logicsphere Limited
Division:	Data Files

Software Programs That Open FirstBreak Concrete Test File Files:

FirstBreak by Logicsphere Limited

Compatible with:

Windows

.TDT

Formatting:	.tdt
Category:	Sim Tower Game File

Game data file associated with SimTower: The Vertical Empire, a construction and management simulation video game. This format is obsolete and no longer supported.

Company:	EA Maxis
Division:	Game Files

Software Programs That Open Sim Tower Game File Files:

SimTower: The Vertical Empire by EA Maxis

Compatible with:

Windows

PlayStation

Sega Saturn

Macintosh

Game Boy Advance

.TDT

Formatting:	.tdt
Category:	THOR Data Tree (TDT) File

Text data file associated with THOR-Merlin, a chemical database system that allows users to store and retrieve chemical information.

Company:	Daylight Chemical Information Systems, Inc.
Division:	Data Files

Software Programs That Open THOR Data Tree (TDT) File Files:

THOR-Merlin by Daylight Chemical Information Systems, Inc.

Compatible with:

Windows

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Troubleshoot TDT Files

Typical TDT Opening Challenges

Unknown Software Disappeared

You attempt to load your TDT file and get an error such as "%%os%% Can't Open The TDT File Extension". If this is the case, it's usually due to the fact that you do not have Unknown Software for %%os%% installed on your computer. The OS won't know what to do with your TDT file, so double-clicking to load the file doesn't work.

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

Wrong Version of Unknown Software is Installed

Occasionally, you might have an outdated version of Unknown Software installed that's incompatible with your AVCHD Thumbnail File type. If you've got the wrong version of Unknown Software installed, you'll need to install the correct version. Most of the time your AVCHD Thumbnail File file was created by a newer Unknown Software than what you have installed.

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

Primarily, problems experienced when opening TDT files are due to having the incorrect version of Unknown Software installed on your computer.

Other Causes of TDT File Opening Problems

You can still experience errors opening TDT files even with the latest version of Unknown Software installed on your PC. If you're still experiencing problems opening TDT files, there could be other computer problems. Other contributing causes:

• Invalid TDT file references in the Windows Registry (the "phonebook" of the Windows Operating System)
• Mistaken removal of the Windows registry TDT description
• Partial installation of Unknown Software that did not fully complete
• File corruption affecting your TDT file
• Malware-tainted TDT file can't be opened
• Device drivers for TDT-related hardware are out-of-date
• Insufficient system resources to successfully open AVCHD Thumbnail File files