CPGZ file icon

CPGZ File Extension

Compressed CPIO Archive

What is CPGZ file?

File with .CPGZ filename extension contains a compressed CPIO (Copy In, Copy Out) file archive. CPGZ format uses Gzip compression algorithm. This type of files is commonly used in Unix or Linux-based systems, including Mac OS. CPGZ file may contain an archive of application files, an installer program, or such common files as documents or photo files. CPGZ format doesn’t impose any limitations to the type of data which can be stored in CPGZ file. Files in CPGZ archive underwent a process comprised of two stages:

  • Creation of uncompressed CPIO archive – results in a single archive that is a sequence of files and directories separated by header sections and file metadata,
  • Archive compression process using GZIP – GZIP is a lossless compression method based on deflate algorithm.

GZIP-compressed archives use the .GZ suffix by default (hence the part GZ of CPGZ extension). This combined suffix convention is similar to the one used by GZIP-compressed TAR archives, for which the extension TGZ is used.

CPGZ may be created when user tries to open ZIP archive on Mac OS, which produces an error. Usually it is the result of a failed attempt to unpack a corrupted or incomplete archive which in turn is compressed again into a CPGZ archive. Subsequent attempts to unpack the archive effects in reverting to the original corrupted ZIP archive and the process repeats, creating a loop. The solution is to reacquire the ZIP archive.

Users running a Linux/Unix-based system can use a tool called ditto for creating and unpacking CPGZ archives. CPGZ archives may also be unpacked with appropriate tools that support GZIP compression. CPIO file archive format was developed back in the days when magnetic tapes were still used for archiving data. Depending on the version, CPIO standard supported files sizes ranging form 2GB to 8GB. Also, different version of CPIO format used either binary or ASCII text format for storing file headers, which effected in many compatibility issues.

Programs which support CPGZ file extension

The following list contains programs grouped by 3 operating systems that support CPGZ files. CPGZ files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

Programs that support CPGZ file

Updated: 03/09/2024

How to open file with CPGZ extension?

There can be multiple causes why you have problems with opening CPGZ files on given system. Fortunately, most common problems with CPGZ files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Install WinZip software

Install software to open CPGZ file Problems with opening and working with CPGZ files are most probably having to do with no proper software compatible with CPGZ files being present on your machine. This one is an easy one. Select WinZip or one of the recommended programs (for example, ditto, The Unarchiver) and download it from appropriate source and install on your system. On the top of the page a list that contains all programs grouped based on operating systems supported can be found. If you want to download WinZip installer in the most secured manner, we suggest you visit WinZip Computing, S.L. website and download from their official repositories.

Step 2. Update WinZip to the latest version

Update software that support file extension CPGZYou still cannot access CPGZ files although WinZip is installed on your system? Make sure that the software is up to date. Sometimes software developers introduce new formats in place of that already supports along with newer versions of their applications. If you have an older version of WinZip installed, it may not support CPGZ format. The most recent version of WinZip is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Assign WinZip to CPGZ files

If the issue has not been solved in the previous step, you should associate CPGZ files with latest version of WinZip you have installed on your device. The next step should pose no problems. The procedure is straightforward and largely system-independent

Associate software with CPGZ file on Windows

Change the default application in Windows

  • Right-click the CPGZ file and choose Open with option
  • Click Choose another app and then select More apps option
  • The last step is to select Look for another app on this PC option supply the directory path to the folder where WinZip is installed. Now all that is left is to confirm your choice by selecting Always use this app to open CPGZ files and clicking OK.
Associate software with CPGZ file on Mac

Change the default application in Mac OS

  • Right-click the CPGZ file and select Information
  • Find the Open with option – click the title if its hidden
  • Select the appropriate software and save your settings by clicking Change all
  • If you followed the previous steps a message should appear: This change will be applied to all files with CPGZ extension. Next, click the Continue button to finalize the process.

Step 4. Check the CPGZ for errors

Should the problem still occur after following steps 1-3, check if the CPGZ file is valid. It is probable that the file is corrupted and thus cannot be accessed.

Check CPGZ file for viruses
1. Verify that the CPGZ in question is not infected with a computer virus

If the CPGZ is indeed infected, it is possible that the malware is blocking it from opening. Scan the CPGZ file as well as your computer for malware or viruses. CPGZ file is infected with malware? Follow the steps suggested by your antivirus software.

2. Ensure the file with CPGZ extension is complete and error-free

If the CPGZ file was sent to you by someone else, ask this person to resend the file to you. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. When downloading the file with CPGZ extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Verify whether your account has administrative rights

Some files require elevated access rights to open them. Log out of your current account and log in to an account with sufficient access privileges. Then open the Compressed CPIO Archive file.

4. Verify that your device fulfills the requirements to be able to open WinZip

If the system is under havy load, it may not be able to handle the program that you use to open files with CPGZ extension. In this case close the other applications.

5. Verify that your operating system and drivers are up to date

Latest versions of programs and drivers may help you solve problems with Compressed CPIO Archive files and ensure security of your device and operating system. Outdated drivers or software may have caused the inability to use a peripheral device needed to handle CPGZ files.

Do you want to help?

If you have additional information about the CPGZ file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on CPGZ file.

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