CUJ File Extension

What is CUJ file?

CUJ filename suffix is mostly used for Personal Backup Data Format files. CUJ file format is compatible with software that can be installed on Windows system platform. CUJ file belongs to the Misc Files category just like 6033 other filename extensions listed in our database. Personal Backup is by far the most used program for working with CUJ files. Personal Backup software was developed by J. Rathlev, IEAP, Kiel University, and on its official website you may find more information about CUJ files or the Personal Backup software program.

Programs which support CUJ file extension

Below is a table that list programs that support CUJ files. Files with CUJ extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

Updated: 12/26/2020

How to open file with CUJ extension?

Problems with accessing CUJ may be due to various reasons. What is important, all common issues related to files with CUJ extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. We have prepared a listing of which will help you resolve your problems with CUJ files.

Step 1. Download and install Personal Backup

The most common reason for such problems is the lack of proper applications that supports CUJ files installed on the system. The solution is straightforward, just download and install Personal Backup. The full list of programs grouped by operating systems can be found above. If you want to download Personal Backup installer in the most secured manner, we suggest you visit J. Rathlev, IEAP, Kiel University website and download from their official repositories.

Step 2. Check the version of Personal Backup and update if needed

If the problems with opening CUJ files still occur even after installing Personal Backup, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of Personal Backup is available. Sometimes software developers introduce new formats in place of that already supports along with newer versions of their applications. This can be one of the causes why CUJ files are not compatible with Personal Backup. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using Personal Backup.

Step 3. Assign Personal Backup to CUJ files

After installing Personal Backup (the most recent version) make sure that it is set as the default application to open CUJ files. The next step should pose no problems. The procedure is straightforward and largely system-independent

Change the default application in Windows

• Clicking the CUJ with right mouse button will bring a menu from which you should select the Open with option
• Click Choose another app and then select More apps option
• To finalize the process, select Look for another app on this PC entry and using the file explorer select the Personal Backup installation folder. Confirm by checking Always use this app to open CUJ files box and clicking OK button.

Change the default application in Mac OS

• By clicking right mouse button on the selected CUJ file open the file menu and choose Information
• Open the Open with section by clicking its name
• From the list choose the appropriate program and confirm by clicking Change for all....
• If you followed the previous steps a message should appear: This change will be applied to all files with CUJ extension. Next, click the Continue button to finalize the process.

Step 4. Check the CUJ for errors

If you followed the instructions form the previous steps yet the issue is still not solved, you should verify the CUJ file in question. Being unable to access the file can be related to various issues.

1. Verify that the CUJ in question is not infected with a computer virus

Should it happed that the CUJ is infected with a virus, this may be that cause that prevents you from accessing it. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. CUJ file is infected with malware? Follow the steps suggested by your antivirus software.

2. Check whether the file is corrupted or damaged

If you obtained the problematic CUJ file from a third party, ask them to supply you with another copy. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. When downloading the file with CUJ extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Check if the user that you are logged as has administrative privileges.

Sometimes in order to access files user need to have administrative privileges. Log out of your current account and log in to an account with sufficient access privileges. Then open the Personal Backup Data Format file.

4. Make sure that the system has sufficient resources to run Personal Backup

If the systems has insufficient resources to open CUJ files, try closing all currently running applications and try again.

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

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Personal Backup Data Format files. Outdated drivers or software may have caused the inability to use a peripheral device needed to handle CUJ files.

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