SUL File Extension

What is SUL file?

Full format name of files that use SUL extension is Gfa Raytrace Image. Files with SUL extension may be used by programs distributed for Windows platform. SUL file format, along with 524 other file formats, belongs to the Graphic Files category. The most popular software that supports SUL files is XnView. XnView software was developed by Pierre-Emmanuel Gougelet, and on its official website you may find more information about SUL files or the XnView software program.

Programs which support SUL file extension

Below is a table that list programs that support SUL files. Files with SUL suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.

How to open file with SUL extension?

There can be multiple causes why you have problems with opening SUL files on given system. What is important, all common issues related to files with SUL extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. The list below will guide you through the process of addressing the encountered problem.

Step 1. Install XnView software

Problems with opening and working with SUL files are most probably having to do with no proper software compatible with SUL files being present on your machine. To address this issue, go to the XnView developer website, download the tool, and install it. It is that easy Above you will find a complete listing of programs that support SUL files, classified according to system platforms for which they are available. The safest method of downloading XnView installed is by going to developer’s website (Pierre-Emmanuel Gougelet) and downloading the software using provided links.

Step 2. Verify the you have the latest version of XnView

If the problems with opening SUL files still occur even after installing XnView, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of XnView is available. It may also happen that software creators by updating their applications add compatibility with other, newer file formats. The reason that XnView cannot handle files with SUL may be that the software is outdated. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using XnView.

Step 3. Associate Gfa Raytrace Image files with XnView

If you have the latest version of XnView installed and the problem persists, select it as the default program to be used to manage SUL 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.

Change the default application in Windows

• Clicking the SUL 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
• Finally select Look for another app on this PC, point to the folder where XnView is installed, check the Always use this app to open SUL files box and conform your selection by clicking OK button

Change the default application in Mac OS

• By clicking right mouse button on the selected SUL file open the file menu and choose Information
• Proceed to the Open with section. If its closed, click the title to access available options
• Select XnView and click Change for all...
• Finally, a This change will be applied to all files with SUL extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Check the SUL for errors

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

1. The SUL may be infected with malware – make sure to scan it with an antivirus tool.

If the SUL is indeed infected, it is possible that the malware is blocking it from opening. Scan the SUL file as well as your computer for malware or viruses. If the SUL file is indeed infected follow the instructions below.

2. Check whether the file is corrupted or damaged

If the SUL 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. If the SUL 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.

Some files require elevated access rights to open them. Log in using an administrative account and see If this solves the problem.

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

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

5. Ensure that you have the latest drivers and system updates and patches installed

Latest versions of programs and drivers may help you solve problems with Gfa Raytrace Image files and ensure security of your device and operating system. It is possible that one of the available system or driver updates may solve the problems with SUL files affecting older versions of given software.

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