DU1 File Extension

What is DU1 file?

DU1 is a file extension commonly associated with Atari ST Picture Image Format files. DU1 files are supported by software applications available for devices running Windows. DU1 file belongs to the Raster Image Files category just like 522 other filename extensions listed in our database. The most popular software that supports DU1 files is RECOIL. RECOIL software was developed by Piotr Fusik and Adrian Matoga, and on its official website you may find more information about DU1 files or the RECOIL software program.

Programs which support DU1 file extension

Programs that can handle DU1 files are as follows. DU1 files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

Updated: 12/16/2020

How to open file with DU1 extension?

There can be multiple causes why you have problems with opening DU1 files on given system. On the bright side, the most encountered issues pertaining to Atari ST Picture Image Format files aren’t complex. In most cases they can be addressed swiftly and effectively without assistance from a specialist. We have prepared a listing of which will help you resolve your problems with DU1 files.

Step 1. Get the RECOIL

The main and most frequent cause precluding users form opening DU1 files is that no program that can handle DU1 files is installed on user’s system. The solution to this problem is very simple. Download RECOIL and install it on your device. The full list of programs grouped by operating systems can be found above. The safest method of downloading RECOIL installed is by going to developer’s website (Piotr Fusik and Adrian Matoga) and downloading the software using provided links.

Step 2. Update RECOIL to the latest version

If the problems with opening DU1 files still occur even after installing RECOIL, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of RECOIL is available. 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 RECOIL installed, it may not support DU1 format. The most recent version of RECOIL is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Assign RECOIL to DU1 files

If you have the latest version of RECOIL installed and the problem persists, select it as the default program to be used to manage DU1 on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Selecting the first-choice application in Windows

• Choose the Open with entry from the file menu accessed by right-mouse clicking on the DU1 file
• Select Choose another app → More apps
• Finally select Look for another app on this PC, point to the folder where RECOIL is installed, check the Always use this app to open DU1 files box and conform your selection by clicking OK button

Selecting the first-choice application in Mac OS

• Right-click the DU1 file and select Information
• Find the Open with option – click the title if its hidden
• Select RECOIL and click Change for all...
• If you followed the previous steps a message should appear: This change will be applied to all files with DU1 extension. Next, click the Continue button to finalize the process.

Step 4. Verify that the DU1 is not faulty

Should the problem still occur after following steps 1-3, check if the DU1 file is valid. Being unable to access the file can be related to various issues.

1. Verify that the DU1 in question is not infected with a computer virus

If the DU1 is indeed infected, it is possible that the malware is blocking it from opening. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. If the scanner detected that the DU1 file is unsafe, proceed as instructed by the antivirus program to neutralize the threat.

2. Ensure the file with DU1 extension is complete and error-free

If you obtained the problematic DU1 file from a third party, ask them to supply you with another copy. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. If the DU1 file has been downloaded from the internet only partially, try to redownload it.

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

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Switch to an account that has required privileges and try opening the Atari ST Picture Image Format file again.

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

If the systems has insufficient resources to open DU1 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 Atari ST Picture Image Format files. It may be the case that the DU1 files work properly with updated software that addresses some system bugs.

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