CII file format description

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

1 filename extension(s) found in our database.

.cii - Intergraph CAESAR II Data File

The CII data files are related to CAESAR II. The CII file is an Intergraph CAESAR II Data File. Intergraph CAESAR II is a pipe flexibility and stress analysis software product that helps ensure your pipe systems are compliant with international codes and standards.

Data files
- / -
Intergraph CAESAR II Data File related extensions:
HEASARC Calibration Database
PaperPort Data
Adobe Mocha for After Effects Moxel Data
SVAL Modal Data
Clustify Output
Data Flask Package

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

Can't open a .cii 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 .cii file extension is often given incorrectly!

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

ci, cik, cil, cio, cki, cli, cui, dii, ici, ii, sii, vii

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

AquaCrop Climate Data
SWAT Master Watershed Data
iBlaze Case Information File
IconWorkshop Extended Information
Autodesk AutoCAD Custom Workspace
Off by One Web Browser Cookie Data

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, 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 .cii file format, then write to us! >> CII file