$D$ File Extension

What is $D$ file?

Full format name of files that use $D$ extension is OS/2 Planner Data. IBM defined the OS/2 Planner Data format standard. $D$ files are supported by software applications available for devices running . $D$ file belongs to the Misc Files category just like 6033 other filename extensions listed in our database. OS/2 is by far the most used program for working with $D$ files.

Programs which support $D$ file extension

Below is a table that list programs that support $D$ files. Files with $D$ 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 $D$ extension?

Being unable to open files with $D$ extension can be have various origins. What is important, all common issues related to files with $D$ extension can be resolved by the users themselves. The process is quick and doesn’t involve an IT expert. We have prepared a listing of which will help you resolve your problems with $D$ files.

Step 1. Install OS/2 software

The most common reason for such problems is the lack of proper applications that supports $D$ files installed on the system. To address this issue, go to the OS/2 developer website, download the tool, and install it. It is that easy The full list of programs grouped by operating systems can be found above. The safest method of downloading OS/2 installed is by going to developer’s website () and downloading the software using provided links.

Step 2. Verify the you have the latest version of OS/2

If you already have OS/2 installed on your systems and $D$ 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. This can be one of the causes why $D$ files are not compatible with OS/2. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using OS/2.

Step 3. Associate OS/2 Planner Data files with OS/2

If the issue has not been solved in the previous step, you should associate $D$ files with latest version of OS/2 you have installed on your device. The next step should pose no problems. The procedure is straightforward and largely system-independent

Selecting the first-choice application in Windows

• Right-click the $D$ file and choose Open with option
• Next, select the Choose another app option and then using More apps open the list of available applications
• The last step is to select Look for another app on this PC option supply the directory path to the folder where OS/2 is installed. Now all that is left is to confirm your choice by selecting Always use this app to open $D$ files and clicking OK.

Selecting the first-choice application in Mac OS

• From the drop-down menu, accessed by clicking the file with $D$ extension, select Information
• Open the Open with section by clicking its name
• From the list choose the appropriate program and confirm by clicking Change for all....
• Finally, a This change will be applied to all files with $D$ extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Verify that the $D$ is not faulty

You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper $D$ file. Being unable to access the file can be related to various issues.

1. The $D$ 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 $D$ file hinders attempts to open it. Scan the $D$ file as well as your computer for malware or viruses. If the $D$ file is indeed infected follow the instructions below.

2. Verify that the $D$ file’s structure is intact

If you obtained the problematic $D$ 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. It could happen the the download process of file with $D$ 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

Sometimes in order to access files user need to have administrative privileges. Switch to an account that has required privileges and try opening the OS/2 Planner Data file again.

4. Make sure that the system has sufficient resources to run OS/2

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

5. Verify that your operating system and drivers are up to date

Latest versions of programs and drivers may help you solve problems with OS/2 Planner Data 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 $D$ files affecting older versions of given software.

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