While searching for an answer to the question - How to open the CIO file? - you probably found websites, which offer software that was able to open any file extension. Do not be fooled, there is no one program that will allow you to work with any file extension, including the CIO file. Each program contains a different type of data and you need specialized software to properly work with the CIO file. Here is a list of programs that are designed to work with the CIO file - remember, these applications are able to open at most a few file extensions, they are designed to work with a specific data type.
| File type | SWAT Master Watershed |
| Developer | Grassland, Soil & Water Research Laboratory |
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If after installing the program from a list, you still cannot open a file with the CIO extension, the reason may be that the file is damaged. The solution may be to find a new copy of the CIO file you want to open
In this case, the easiest way is to use the tool built into the operating system for association of the CIO file with applications to support it. Double click on the file you cannot open - the operating system will display a list of programs that are likely to work with your CIO file. Choose one of them, or select the location on a disk where you installed one of the applications from our list. Windows should then open the CIO file using the program installed earlier.
Entries containing links of the CIO file extensions with applications is located in the HKEY_CLASSES_ROOT. If you do not know how to get to the Windows Registry, or how to make changes in it, ask a specialist for help. Lack of knowledge on the subject may cause irreversible changes on your computer.
There may be a situation when a computer virus passes itself off as the CIO file. In this case, such a file will definitely not be opened. Download a good antivirus program and scan the CIO file mentioned. If the antivirus application detects malicious data, it may signify that the CIO file is infected.
| CIT | Intergraph Scanned Image |
| CIN96LM | Microsoft Cinemania |
| CI | CitectSCADA Format |
| CIW | Web Of Science Export |
| CIM | CimPack Design Drawing |
| CIN | Kodak Cineon Image Format |
| CIL | Microsoft Office Clip Gallery Download Package |
| CISO | Wii Compressed Game Image |
| CIV5SAVE | Civilization 5 Saved Game Format |
| CIDB | Apple ITunes CD Information Format |
