C21 file format description
Many people share .c21 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .c21 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .c21 files.
1 filename extension(s) found in our database.
.c21 - CARE-S InfoWorks Defined Pollutant Detail Data
C21 file is a CARE-S InfoWorks Defined Pollutant Detail Data. Computer-Aided Rehabilitation Program for Sewers (CARE-S) is a software program that supports efficiency in rehabilitation decisions.
- .c21 file format description:
- C21 format description not yet available
- Data files
- - / -
- CARE-S InfoWorks Defined Pollutant Detail Data related links:
- CARE-S InfoWorks Defined Pollutant Detail Data related extensions:
Naturally, other applications may also use the .c21 file extension. Even harmful programs can create .c21 files. Be especially cautious with .c21 files coming from an unknown source!
Can't open a .c21 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.
- Open Control Panel > Control Panel Home > Default Programs > Set Associations.
- Select a file type in the list and click Change Program.
The .c21 file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
21, ce1, c2l, cw1, c2w
Is it possible that the filename extension is misspelled?
Similar file extensions in our database:
- Cybernet v2 Document
- ComputerEyes Raw Image
- Creeper World Game Map Data
- POV-Ray Include File
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