Known CI Files

Main CI Affiliation

.CI

File Format:	.ci
Category:	Windows Content Indexer Catalog File

The CI file is mainly used by Microsoft Windows 2000 or later versions. It's a search file that stores search info's index that the operating system uses when displaying results file system's search results.

Author:	Microsoft Corporation
Group:	System Files
Location:	HKEY_CLASSES_ROOT\.ci

Software Programs That Open The Windows Content Indexer Catalog File:

Microsoft Windows by Microsoft Corporation

Windows

Secondary CI Associations

.CI

File Format:	.ci
Category:	PolySpace Preprocessed Code File

The CI file is a compiler file primarily associated with PolySpace, a tool for code verification that performs Ada source code and C++'s static analysis. The file consists of an original copy of the compiled file except for macros and headers.

Author:	MathWorks
Group:	Developer Files

Software Programs That Open PolySpace Preprocessed Code File Files:

Polyspace by MathWorks

Compatible with:

Windows

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CI File Complications

Issues Opening CI Files

Microsoft Windows is Not Installed

If you attempt to load your CI file, you experience a message such as "Can't Open CI Files". Generally, this is experienced in %%os%% because Microsoft Windows isn't installed on your PC. Your operating system cannot associate your CI with Microsoft Windows, so double-clicking the file won't work.

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

Outdated Microsoft Windows

It is possible that your version of Microsoft Windows isn't able to open your Windows Content Indexer Catalog File file due to incompatibility. You will need to download a newer version of Microsoft Windows if you don't have the right version. Your Windows Content Indexer Catalog File file was probably created by a newer release of Microsoft Windows than what's currently installed your computer.

Tip: If you right-click on your CI file, then select "Properties" (Windows) or "Get Info" (Mac), you can obtain hints about what version you need.

Ultimately, most of the difficulties opening CI files are due to having the wrong version of Microsoft Windows installed.

More Causes of Problems Opening CIs

Although you might already have Microsoft Windows or another CI-associated software installed on your computer, you can still encounter problems opening Windows Content Indexer Catalog File files. If you are continuing to have errors with loading CI files, other external issues might be to blame. Issues that aren't software-related:

• Corrupt Windows Registry file path references for CI
• Mistaken removal of the Windows registry CI description
• Corrupt install of Microsoft Windows or other CI-related program
• File corruption affecting your CI file
• Your CI is infected with malware
• Drivers associated with CI software need to be updated
• Insufficient system resources to successfully open Windows Content Indexer Catalog File files