drag and drop registration did not succeed system threading error - debugging

Whenever I open a project to translate, I get an exception error and Trados freezes, I have to close the program via task manager.

I have tried repairing and reinstalling studio but it did not seem to work.

Basically I can do batch tasks, but cannot translate. Please help!

This is the message I get:

See the end of this message for details on invoking

just-in-time (JIT) debugging instead of this dialog box.

 

************** Exception Text **************

System.InvalidOperationException: DragDrop registration did not succeed. ---> System.Threading.ThreadStateException: Current thread must be set to single thread apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThreadAttribute marked on it.

   at System.Windows.Forms.Control.SetAcceptDrops(Boolean accept)

   --- End of inner exception stack trace ---

   at System.Windows.Forms.Control.SetAcceptDrops(Boolean accept)

   at System.Windows.Forms.Control.OnHandleCreated(EventArgs e)

   at System.Windows.Forms.Form.OnHandleCreated(EventArgs e)

   at Infragistics.Win.UltraWinDock.FloatingWindowContainer.OnHandleCreated(EventArgs e)

   at System.Windows.Forms.Control.WmCreate(Message& m)

   at System.Windows.Forms.Control.WndProc(Message& m)

   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)

   at System.Windows.Forms.ContainerControl.WndProc(Message& m)

   at System.Windows.Forms.Form.WmCreate(Message& m)

   at System.Windows.Forms.Form.WndProc(Message& m)

   at Infragistics.Win.UltraWinDock.FloatingWindowContainerEx.WndProc(Message& message)

   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

 

 

************** Loaded Assemblies **************

mscorlib

    Assembly Version: 4.0.0.0

    Win32 Version: 4.8.9325.0 built by: NET481REL1LAST_25H2_C

    CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll

----------------------------------------

SDLTradosStudio

    Assembly Version: 18.0.0.0

    Win32 Version: 18.1.4.6694

    CodeBase: file:///C:/Program%20Files%20(x86)/Trados/Trados%20Studio/Studio18/SDLTradosStudio.exe

(... here is a huge list that continues....)

************** JIT Debugging **************

To enable just-in-time (JIT) debugging, the .config file for this

application or computer (machine.config) must have the

jitDebugging value set in the system.windows.forms section.

The application must also be compiled with debugging

enabled.

 

For example:

 

<configuration>

    <system.windows.forms jitDebugging="true" />

</configuration>

 

When JIT debugging is enabled, any unhandled exception

will be sent to the JIT debugger registered on the computer

rather than be handled by this dialog box.



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[edited by: Kate Sotejeff-Wilson at 7:30 AM (GMT 1) on 9 Jun 2026]
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