Sorts of CT3 Files

Dominant CT3 File Type

.CT3

Formatting:	.ct3
Type:	Microsoft Systems Management Server (SMS) Control File

A CT3 file is a file related to Microsoft Systems Management Server and contains some kind of control data for Microsoft SMS program.

Company:	Microsoft Corporation
Group:	Data Files
Entry:	HKEY_CLASSES_ROOT\.ct3

Software Programs That Open The Microsoft Systems Management Server (SMS) Control File:

Microsoft Systems Management Server by Microsoft Corporation

Windows

	Mac
	iOS

Android

Linux

Symbian OS

Additional CT3 Files

.CT3

Formatting:	.ct3
Type:	CaseMap Case Analysis Template

This CT3 file is an analysis template file created by the program CaseMap.

Company:	LexisNexis
Group:	Data Files

Software Programs That Open CaseMap Case Analysis Template Files:

CaseMap by LexisNexis

Compatible with:

Windows

.CT3

Formatting:	.ct3
Type:	CTRAN/W Sketch

A CT3 file is a sketch file created by the program CTRAN/W. CTRAN/W is a CAD solution used to model the movement of contaminants.

Company:	Geoslope
Group:	CAD Files

Software Programs That Open CTRAN/W Sketch Files:

CTRAN/W by Geoslope

Compatible with:

Windows

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CT3 File Complications

Typical CT3 Opening Challenges

Microsoft Systems Management Server Disappeared

You attempt to load your CT3 file and get an error such as "%%os%% Can't Open The CT3 File Extension". If this is the case, it's usually due to the fact that you do not have Microsoft Systems Management Server for %%os%% installed on your computer. Because your operating system doesn't know what to do with this file, you won't be able to open it by double-clicking.

Tip: When you have another program installed that you know will open your CT3, you can select it from the other programs listed (see "Show Apps").

Outdated Microsoft Systems Management Server

In other instances, your Microsoft Systems Management Server (SMS) Control File file version may not be supported by your version of Microsoft Systems Management Server. Visit the Microsoft Corporation website to download (or purchase) the latest version of Microsoft Systems Management Server. Your Microsoft Systems Management Server (SMS) Control File file was probably created by a newer release of Microsoft Systems Management Server than what's currently installed your computer.

Tip: Investigate your CT3 file by right-clicking and selecting "Properties" to find clues on what version you need.

Regardless, most of the CT3 file opening problems relate to not having the right version of Microsoft Systems Management Server installed.

Other Causes of CT3 File Opening Problems

Even with the correct version of Microsoft Systems Management Server installed, you can still experience difficulties opening CT3s. If you are continuing to have errors with loading CT3 files, other external issues might be to blame. These other problems include (listed in order from most to least common):

• Invalid CT3 file references in the Windows Registry (the "phonebook" of the Windows Operating System)
• Accidental deletion of the description of the CT3 file in the Windows registry
• Corrupt install of Microsoft Systems Management Server or other CT3-related program
• Your CT3 file is corrupted (issues with your Microsoft Systems Management Server (SMS) Control File file itself)
• Past or present virus infection has affected your CT3
• CT3-related hardware has device drivers that obsolete
• Your computer does not have the adequate system resources to open the Microsoft Systems Management Server (SMS) Control File format