>> LAC file

LAC file format description

Many people share .lac files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .lac file can be edited, converted or printed with. On this page, we try to provide assistance for handling .lac files.

1 filename extension(s) found in our database.

.lac - Cognos Local Authentication Cache

The LAC data files are related to Cognos. The LAC file is a Cognos Local Authentication Cache. Cognos is a world leader in Business Intelligence solutions that improve and direct corporate performance. Cognos can use LAC file if LDAP server is not available and you want to connect to a previous connected cube.

Data files
- / -
Cognos Local Authentication Cache related extensions:
Cognos Framework Manager Project
IBM Cognos Local Authentication Export
Cognos Cube File
Cognos Exported Model Data
Cognos Exported Binary Model Data
IBM Cognos Data

Naturally, other applications may also use the .lac file extension. Even harmful programs can create .lac files. Be especially cautious with .lac files coming from an unknown source!

Can't open a .lac file?

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

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .lac file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

ac, alc, kac, la, lad, laf, las, lav, lax, lc, lca, lwc, lxc, lzc, mac

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Need for Speed Data
Alteryx Designer Allocate License Data
SBStudio II Song Package
Daylon Leveller Animation
GNU Autoconf Input File
CaseWare Working Papers Client File

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .lac file format, then write to us!