Tips to open QMDB file

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

QMDB file extension

File Name APM Planner Map Database Format
File Category Misc Files

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

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

What is QMDB file?

The file with the extension QMDB is the Misc Files file type. In addition to this file, the Misc Files category includes 6033 related files. APM Planner Map Database Format is most often found on 1 operating systems. The file will work on Windows systems, unfortunately not on others. It is recommended to use APM Planner to handle this file. This is a program created by ArduPilot Dev Team.

How to open QMDB file?

An often recurring problem with APM Planner Map Database Format is that QMDB is not associated with the correct program file. This causes the file QMDB to open by system applications not designed for this purpose, or to display a message that there is no associated program. This can be quickly resolved by following the instructions below.

The first thing you should do is just "doubleclick" on the QMDB 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 APM Planner

In this case, you should first verify that the APM Planner application is installed on the computer. The easiest method is to use the system search engine by entering the program name APM Planner in it. In the absence of an appropriate program, its installation in the vast majority of cases will fix the problem. Later in this article you will find a list of programs that can open QMDB files.

Programs to open QMDB file

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

APM Planner
APM Planner
Step 2. Create association of APM Planner with QMDB files

However, it may happen that the application itself does not cause the QMDB file to open in the APM Planner application, but you can set it manually. This option is available from the level of Properties of a specific file available in the context menu. Information about the file and the program that the file is associated with are available here. Using the "Change" button we can select the desired program. If there is no software on the list, simply select "Browse" and manually select the directory where the application is installed. The "always use the selected program ..." field will set the APM Planner application as the default for handling the QMDB file.

Step 3. Update APM Planner to the latest version

If, however, after binding APM Planner with APM Planner Map Database 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 ArduPilot Dev Team page and install.

Step 4. Check for the following problems with the QMDB 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 QMDB 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 operating system may be infected with a computer virus. Perform a virus scan using available and up-to-date anti-virus software. If this is not possible, you can use the online scanner. However, it is important to scan the entire system, not only the file QMDB or the program directory. As a result of the scan, sometimes it is not possible to recover QMDB files, which are deleted if there is a backup of this file, then after restoring it, it must also be scanned.
Older version of QMDB file may not always be supported by the latest software version. On their websites, developers usually offer free solutions to such problems, e.g. in the form of a conversion program or an older version of the program.
There can be many reasons for this. Depending on the type of file, it is necessary to repair it accordingly. Some programs offer the option of recovering data from damaged QMDB files. You can restore the file from a backup or use help.
When reading, a message appears that the file was encrypted or corrupted. The encrypted QMDB files cannot be played on other computers than the one on which they were encrypted, they must be decrypted before using on another device.
Some operating systems do not allow file operations in certain locations, eg in system directories or directly on the system drive. The problem is only writing to the file, not reading it. It is best to move QMDB to a different directory.
This problem only occurs with more complex files. In this case, the QMDB file is blocked by the first application to open it. Running programs (including those in the background) should be verified. Sometimes it is necessary to wait a while before referencing the QMDB file again. However, some background programs may block the QMDB file while scanning. If this does not work either, restart the device.