HDX File Extension

What is HDX file?

Full format name of files that use HDX extension is Delphi MultiHelp Index Format. Autodesk defined the Delphi MultiHelp Index Format format standard. HDX file format is compatible with software that can be installed on Windows system platform. Files with HDX extension are categorized as Misc Files files. The Misc Files subset comprises 6033 various file formats. AutoCAD is by far the most used program for working with HDX files. Software named AutoCAD was created by Autodesk, Inc.. In order to find more detailed information on the software and HDX files, check the developer’s official website.

Programs which support HDX file extension

The following listing features HDX-compatible programs. HDX files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

How to open file with HDX extension?

There can be multiple causes why you have problems with opening HDX files on given system. On the bright side, the most encountered issues pertaining to Delphi MultiHelp Index Format files aren’t complex. In most cases they can be addressed swiftly and effectively without assistance from a specialist. The list below will guide you through the process of addressing the encountered problem.

Step 1. Install AutoCAD software

The most common reason for such problems is the lack of proper applications that supports HDX files installed on the system. To address this issue, go to the AutoCAD developer website, download the tool, and install it. It is that easy 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 AutoCAD installer in the most secured manner, we suggest you visit Autodesk, Inc. website and download from their official repositories.

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

If you already have AutoCAD installed on your systems and HDX files are still not opened properly, check if you have the latest version of the software. Software developers may implement support for more modern file formats in updated versions of their products. If you have an older version of AutoCAD installed, it may not support HDX format. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using AutoCAD.

Step 3. Assign AutoCAD to HDX files

If the issue has not been solved in the previous step, you should associate HDX files with latest version of AutoCAD you have installed 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.

The procedure to change the default program in Windows

• Right-click the HDX file and choose Open with option
• Next, select the Choose another app option and then using More apps open the list of available applications
• Finally select Look for another app on this PC, point to the folder where AutoCAD is installed, check the Always use this app to open HDX files box and conform your selection by clicking OK button

The procedure to change the default program in Mac OS

• By clicking right mouse button on the selected HDX file open the file menu and choose Information
• Open the Open with section by clicking its name
• Select AutoCAD and click Change for all...
• A message window should appear informing that This change will be applied to all files with HDX extension. By clicking Continue you confirm your selection.

Step 4. Verify that the HDX is not faulty

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

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

Should it happed that the HDX is infected with a virus, this may be that cause that prevents you from accessing it. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. HDX file is infected with malware? Follow the steps suggested by your antivirus software.

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

Did you receive the HDX file in question from a different person? Ask him/her to send it one more time. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. When downloading the file with HDX extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Ensure that you have appropriate access rights

Some files require elevated access rights to open them. Switch to an account that has required privileges and try opening the Delphi MultiHelp Index Format file again.

4. Check whether your system can handle AutoCAD

The operating systems may note enough free resources to run the application that support HDX files. Close all running programs and try opening the HDX file.

5. Check if you have the latest updates to the operating system and drivers

Latest versions of programs and drivers may help you solve problems with Delphi MultiHelp Index Format 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 HDX files affecting older versions of given software.

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