Troubleshooting Qmldbg_preview.dll DLL Errors and Downloading Updates

Last Updated: 12/12/2023
[Average Read Time: 4.5 minutes]

qmldbg_preview.dll, also known as a C++ Application Development Framework file, was created by Viber Media for the development of Qt5. DLL files fall under under the Win32 DLL (Dynamic link library) file type category.

The initial introduction of qmldbg_preview.dll released in MAGIX Music Maker 2020 was for Windows 10 on 07/01/2019. The latest file update released for Viber for Windows 11.7.0.64 was on 10/17/2019 [file version 5.12.5.0].

In this short article, you will discover detailed file information, steps for troubleshooting DLL file problems with qmldbg_preview.dll, and list of free downloads for every version that exists in our comprehensive file directory.

File Analysis Provided by Jason Geater (Author)


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File Overview


General Information
File Name: qmldbg_preview.dll
File Extension: DLL file extension
Description: C++ Application Development Framework
Object File Type: Dynamic link library
File Operating System: Win32
MIME Type: application/octet-stream
User Popularity Rating:
 
Developer and Software Information
Software Developer: The Qt Company Ltd.
Software Program: Qt5
Legal Copyright: Copyright (C) 2019 The Qt Company Ltd.
File Details
Character Set: Unicode
Language Code: English (U.S.)
File Flags: (none)
File Flags Mask: 0x003f
Entry Point: 0x9269
Code Size: 35840


What are qmldbg_preview.dll Error Messages?


Dynamic Link Library qmldbg_preview.dll Errors

qmldbg_preview.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like qmldbg_preview.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like MpSigStub.exe - to follow. These files were created so that multiple programs (eg. Viber for Windows) could share the same qmldbg_preview.dll file, saving valuable memory allocation, therefore making your computer run more efficiently.

Unfortunately, what makes DLL files so convenient and efficient, also makes them extremely vulnerable to problems. If something happens to a shared DLL file, either it goes missing or gets corrupted in some way, it can generate a "runtime" error message. Runtime is pretty self-explanatory; it means that these errors are triggered when qmldbg_preview.dll is attempted to be loaded either when Viber for Windows is starting up, or in some cases already running. Some of the most common qmldbg_preview.dll errors include:

Your qmldbg_preview.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Viber for Windows), or deleted by a malware infection. Furthermore, qmldbg_preview.dll file corruption could be caused from a power outage when loading Viber for Windows, system crash while loading qmldbg_preview.dll, bad sectors on your storage media (usually your primary hard drive), or quite commonly, a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.



How to Fix qmldbg_preview.dll Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your qmldbg_preview.dll issue. These troubleshooting steps are listed in the recommended order of execution.


Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. When you see the search box, type "System Restore" and press "ENTER".
  3. In the search results, find and click System Restore.
  4. Please enter the administrator password (if applicable / prompted).
  5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
  6. Restore your computer to that backup image.

If the Step 1 fails to resolve the qmldbg_preview.dll error, please proceed to the Step 2 below.

Step 2: If recently installed Viber for Windows (or related software), uninstall then try reinstalling Viber for Windows software.

You can uninstall Viber for Windows software by following these instructions (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. In the search box, type "Uninstall" and press "ENTER".
  3. In the search results, find and click "Add or Remove Programs"
  4. Find the entry for Viber for Windows 11.7.0.64 and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Viber for Windows software.

If this Step 2 fails as well, please proceed to the Step 3 below.

Viber for Windows 11.7.0.64

Viber Media

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many qmldbg_preview.dll error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

  1. Hit the Windows Start button
  2. In the search box, type "Update" and press "ENTER".
  3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
  4. If updates are available for download, click "Install Updates".
  5. After the update is completed, restart your PC.

If Windows Update failed to resolve the qmldbg_preview.dll error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.



If Those Steps Fail: Download and Replace Your qmldbg_preview.dll File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate qmldbg_preview.dll file version. We maintain a comprehensive database of 100% malware-free qmldbg_preview.dll files for every applicable version of Viber for Windows. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download qmldbg_preview.dll Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate Viber for Windows folder location:
    Windows 10: C:\Users\Tester\AppData\Local\Viber\qmltooling\
    Windows 10: C:\Program Files (x86)\MAGIX\Music Maker\28\Qt\Qt_x86\qmltooling\
  4. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.


GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve qmldbg_preview.dll problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.



Download qmldbg_preview.dll Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying qmldbg_preview.dll to your appropriate Windows system directory. Viber Media typically does not release Viber for Windows DLL files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing qmldbg_preview.dll and all other DLL files for Viber for Windows. An incorrectly installed DLL file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10


Files Related to qmldbg_preview.dll


DLL Files Related to qmldbg_preview.dll

File Name Description Software Program (Version) File Size (bytes) File Location
AvastAdSDK_Release Sta... Avast Ad SDK Avast AvastAdSDK (18.1.102.0) 1010904 C:\Windows\WinSxS\amd64_microsoft-windows-c..ri...
Qt5Qml.dll C++ Application Development Framework Qt5 (5.11.1.0) 2853736 C:\Users\Tester\AppData\Local\Microsoft\Windows\
Qt5QuickControls2.dll C++ Application Development Framework Qt5 (5.12.5.0) 148552 C:\Users\Tester\AppData\Local\Microsoft\Windows\
Qt5QuickControls2.dll C++ Application Development Framework Qt5 (5.11.1.0) 153960 C:\Users\Tester\AppData\Local\Microsoft\Windows\
qtquickcontrols2plugin... C++ Application Development Framework Qt5 (5.12.5.0) 273992 C:\Users\Tester\AppData\Local\

Other Files Related to qmldbg_preview.dll

File Name Description Software Program (Version) File Size (bytes) File Location
setupact.log Log Viber for Windows 11.7.0.64 16082 C:\Windows\System32\Sysprep\Panther\
api-ms-win-core-synch-... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.17134.12) 13160 C:\Users\Tester\AppData\Local\Microsoft\OneDriv...
api-ms-win-core-synch-... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.16299.15) 10824 C:\Users\Tester\AppData\Local\Viber\
EtwRTEventLog-Applicat... Microsoft Event Trace Log Viber for Windows 11.7.0.64 1592 C:\Windows\System32\LogFiles\WMI\RtBackup\
api-ms-win-core-rtlsup... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.16299.15) 8264 C:\Users\Tester\AppData\Local\Viber\


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