Can't find or load the QT platform plugin “windows”

[Anonymous]

I tried to make an installer for my plugin, which is created for AutoCAD 2016 using QT 5.3.

-- It work perfectly on the development computer, but when I tried to install it somewhere else it give me the following message:
             ~~This application failed to start because it could not find or load the Qt platform plugin "windows".

-- I have already installed the QT plateforms as follows:

    ./contents/

          myPlugin.arx

          icudt53.dll
          icuin53.dll
          icuuc53.dll
          libEGL.dll
          Qt5Core.dll
          Qt5Gui.dll
          Qt5Nework.dll
          Qt5Quick.dll
          Qt5Widgets.dll
          platforms/qwindows.dll

          
-- I also define the runtime paths in the file (PackageContents.xml) as below:

<?xml version="1.0" encoding="utf-8"?>
<ApplicationPackage SchemaVersion="1.0" AutodeskProduct="AutoCAD" Name="StartupCommandTest" Description="Sample showing usage of StartupCommand parameter" AppVersion="1.0.0" ProductType="Application" AppNameSpace="appstore.exchange.autodesk.com" Author="xxxxxx">
  <CompanyDetails Name="XXXXXX" Url="www.xxxxx.com" Email="xxx@xxxx.com" />
  <Components>

    <RuntimeRequirements SupportPath="./Contents/; ./Contents/platforms/" OS="Win64" Platform="AutoCAD*" SeriesMin="R19.0" SeriesMax="R29.0" />
    <ComponentEntry AppName="MyPlugin.arx" ModuleName="./Contents/myPlugin.arx">
    </ComponentEntry>

  </Components>
    <Components Description="CUI">
    <RuntimeRequirements SupportPath="./Contents/Resources/" OS="Win64" Platform="AutoCAD*" SeriesMin="R19.1" SeriesMax="R29.1" />
    <ComponentEntry AppName="myPlugin.cuix" Version="1.1.0" ModuleName="./Contents/myPlugin.cuix"/>
  </Components>
</ApplicationPackage>

--  can anyone help? Thank you in advance.

[augusto.goncalves]

Can you install Process Monitor to determine what is missing? That should help you identify where the system is looking for those DLLs

https://technet.microsoft.com/en-us/sysinternals/processmonitor.aspx

[cmurdo2003]

Just had the same issue with 3ds Max 2018, probably associated with the Civil 3d plugin but I'm not sure. Currently following the only info I can find on this and re-installing 3ds MAx. 

[Anonymous]

Having this problem with revit 2019.

The problem is that it is recurring, and the temp. fix is reinstalling.

[Anonymous]

I installed the QT library on my Windows 10 pc and rebooted, and was then able to download parts from autodesk-fusion.partcommunity.com/3d-cad-models/ into Fusion 360.

[Anonymous]

Please provide the qt library link, I have the same error

[Anonymous]

Hi

Go to https://www.qt.io/download and scroll down to the open source download.

Good luck

Michael

[Anonymous]

What to choose from the checkboxes?