Tips to open HDX file

Can't open the HDX file? You are not the only one. Thousands of users face similar problems every day. Below you will find tips on how to open HDX files as well as a list of programs that support HDX files.

HDX file extension

File Name Delphi MultiHelp Index Format
File Developer Autodesk
File Category Misc Files

The HDX file is supported on 1 operating systems. Depending on your operating system, you may need different software to handle the HDX files. Below is a summary of the number of programs that support and open the HDX file on each system platform.

Operating systems
  • 1
  • 0
  • 0
  • 0
  • 0
  • 0

What is HDX file?

The HDX file has been categorized as Misc Files. The author of this format is Autodesk. Misc Files consists of 6033 similar files. Delphi MultiHelp Index Format appears on 1 operating systems as a functional file. The file will work on Windows systems, unfortunately not on others. It is recommended to use AutoCAD to handle this file. This is a program created by Autodesk, Inc..

How to open HDX file?

An often recurring problem with Delphi MultiHelp Index Format is that HDX is not associated with the correct program file. This is manifested by the fact that HDX files open in unusual applications or do not have an assigned program. How to solve such a problem?

The first thing you should do is just "doubleclick" on the HDX file icon you want to open. If the operating system has an appropriate application to support it and there is also an association between the file and the program, the file should be opened.

Step 1. Install AutoCAD

An often overlooked issue is to make sure that AutoCAD is installed on the computer. The easiest method is to use the system search engine by entering the program name AutoCAD in it. If it is not, installation may solve the problem, as most applications create file associations during installation. Below is a list of programs that support the file HDX.

Programs to open HDX file

Remember to download programs supporting HDX files only from verified and safe sources. We suggest using the websites of software developers.

Step 2. Create association of AutoCAD with HDX files

However, it may happen that the application itself does not cause the HDX file to open in the AutoCAD application, but you can set it manually. It is most convenient to call the context menu with the right mouse button and select Properties. Information about the file and the program that the file is associated with are available here. Changes can be made using the "Change" button. The program should be visible in the window, otherwise it should be selected manually using the "Browse" button and the program installation directory should be indicated. However, it is important to check the "Always use the selected program ..." box, this will allow you to permanently associate the HDX file with the AutoCAD application.

Step 3. Update AutoCAD to the latest version

If, however, after binding AutoCAD with Delphi MultiHelp Index Format there were still problems, you should update the program to the latest version. Some applications allow you to update from the program level, and for others you need to download the installer from the Autodesk, Inc. page and install.

Step 4. Check for the following problems with the HDX file

The problem may also be with the file itself if the above steps don't work. The most common file problems are:

Very often, the file may be size 0 or incomplete. Usually this applies to HDX files downloaded from the Internet in case the download did not finish properly. The file should be downloaded again, making sure that the process has finished correctly.
The most common cause here is computer viruses. A quick virus scan using an up-to-date antivirus program should clear up any doubts. Alternatively, you can use the scanners available online. However, it is important to scan the entire system, not only the file HDX or the program directory. As a result of the scan, sometimes it is not possible to recover HDX files, which are deleted if there is a backup of this file, then after restoring it, it must also be scanned.
Older version of HDX file may not always be supported by the latest software version. Help should be sought from the software developer, as they usually recommend using free file converters or installing an older version of the program.
There can be many reasons for this. The repair method must be adapted to the type of file and damage. Some programs offer the ability to automatically repair HDX file corruption. You can restore the file from a backup or use Autodesk help.
When reading, a message appears that the file was encrypted or corrupted. The encrypted HDX files cannot be played on other computers than the one on which they were encrypted, they must be decrypted before using on another device.
The operating system protects files in some locations (e.g. the root of the system partition) against unauthorized access. While there is usually no problem reading such a file, it may not be possible to save it. If possible, you can try to move the HDX file to another location.
This can happen on a file that does not support multiple access. Some file types can only be opened in one program at a time. Just close unnecessary programs. If the error persists after closing other programs, wait for a while. Antivirus programs or a backup being made may lock the file for a while without the user's knowledge. If nothing helps, please reset the device.