DLU File Extension

DLU file icon
3ds Max Utility Plug-in Format
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What is DLU file?

DLU filename suffix is mostly used for 3ds Max Utility Plug-in Format files. Autodesk defined the 3ds Max Utility Plug-in Format format standard. Files with DLU extension may be used by programs distributed for Windows platform. DLU file format, along with 141 other file formats, belongs to the Plugin Files category. 3ds Max is by far the most used program for working with DLU files.

Programs which support DLU file extension

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

Programs that support DLU file

Windows Windows

How to open file with DLU extension?

Being unable to open files with DLU extension can be have various origins. What is important, all common issues related to files with DLU extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Install 3ds Max software

The main and most frequent cause precluding users form opening DLU files is that no program that can handle DLU files is installed on user’s system. The solution is straightforward, just download and install 3ds Max. On the top of the page a list that contains all programs grouped based on operating systems supported can be found. The safest method of downloading 3ds Max installed is by going to developer’s website () and downloading the software using provided links.

Step 2. Update 3ds Max to the latest version

If the problems with opening DLU files still occur even after installing 3ds Max, it is possible that you have an outdated version of the software. Check the developer’s website whether a newer version of 3ds Max is available. Software developers may implement support for more modern file formats in updated versions of their products. This can be one of the causes why DLU files are not compatible with 3ds Max. The most recent version of 3ds Max is backward compatible and can handle file formats supported by older versions of the software.

Step 3. Associate 3ds Max Utility Plug-in Format files with 3ds Max

After installing 3ds Max (the most recent version) make sure that it is set as the default application to open DLU files. The method is quite simple and varies little across operating systems.

Selecting the first-choice application in Windows

  • Right-click the DLU file and choose 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 3ds Max is installed, check the Always use this app to open DLU files box and conform your selection by clicking OK button

Selecting the first-choice application in Mac OS

  • From the drop-down menu, accessed by clicking the file with DLU extension, select Information
  • Find the Open with option – click the title if its hidden
  • 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 DLU extension. Next, click the Continue button to finalize the process.

Step 4. Check the DLU for errors

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

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

If the file is infected, the malware that resides in the DLU file hinders attempts to open it. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. If the DLU file is indeed infected follow the instructions below.

2. Verify that the DLU file’s structure is intact

If the DLU file was sent to you by someone else, ask this person to resend the file to you. During the copy process of the file errors may occurred rendering the file incomplete or corrupted. This could be the source of encountered problems with the file. It could happen the the download process of file with DLU extension was interrupted and the file data is defective. Download the file again from the same source.

3. Verify whether your account has administrative rights

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 3ds Max Utility Plug-in Format file again.

4. Check whether your system can handle 3ds Max

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

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

Up-to-date system and drivers not only makes your computer more secure, but also may solve problems with 3ds Max Utility Plug-in Format file. It is possible that one of the available system or driver updates may solve the problems with DLU files affecting older versions of given software.

Do you want to help?

If you have additional information about the DLU 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 DLU file.

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