Cara mengatasi dummy file this is not the exe you are looking for

Issue:

When double-clicking a DWG file in Windows Explorer to have it open in AutoCAD products, a message similar to one of the following is displayed:
 

Windows cannot find '\acad.exe'. Make sure you've typed the name correctly, then try again.

Windows cannot find '\.dwg'. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.

Windows cannot find '[null]'. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.

Windows cannot find 'C:\Program Files\Autodesk\AutoCAD \acad.exe'.
Windows cannot find 'C:\Program Files\Autodesk\AutoCAD LT \acadlt.exe'.

Causes:

• A version of AutoCAD has been uninstalled and the registry keys for associating .dwg files to the program were removed or not installed again. This can occur when installing AutoCAD [even as a trial], then installing AutoCAD LT, and then uninstalling AutoCAD.
• AutoCAD was installed into a custom directory location, instead of the default C:\Program Files\Autodesk location, but the DWG Common registry key points to the default path.

Solution:

Try the following in order, testing after each:

1. Launch the AutoCAD product version to be used, close it, and then double-click on a DWG file.

Note: This solution will work only if DWG files are already set to be opened using the AutoCAD DWG Launcher [see next step].

1. Associate DWG files to the AutoCAD DWG Launcher or AutoCAD Application [see DWG file type associativity in Windows].

2. Install DWG TrueView:
   1. Install the version of DWG TrueView that matches the version of AutoCAD [see Where to download previous versions of DWG TrueView].
   2. Start and exit DWG TrueView. Confirm that DWG files open in it.
   3. Start and exit AutoCAD. Confirm that DWG files now open in it.
3. Edit the Windows registry [see warning below]. Note that the following example uses AutoCAD 2020. The value will differ depending on the release version of AutoCAD, AutoCAD LT, or DWG TrueView.

Option 1

1. ​​​​​​​​​​​​​​​​​​​​​Delete these registry keys:

• HKEY_CLASSES_ROOT\.dwg
• HKEY_CURRENT_USER\Software\Classes\.dwg
• HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.dwg
• HKEY_CURRENT_USER\Software\Microsoft\Windows\Roaming\OpenWith\FileExts\.dwg

1. Launch AutoCAD product.
2. A dialog pops up. Choose "Always reassociate DWG files with AutoCAD [recommended]".

​​​​​​​Option 2

1. Exit AutoCAD.
2. Press WINDOWS-R on the keyboard to bring up the Run window, enter REGEDIT and click OK.
3. Navigate to and select:

HKEY_CURRENT_USER\Software\Autodesk\DwgCommon\shellex\apps\{