IDE 2.0.3 complation error "No connection established"

Development Tools IDE 2.x
2

Hi @Jamhough22. I'm going to ask you to post some additional information that might help us to identify the problem.

Please do this:

  1. Start Windows "File Explorer".
  2. Open the Arduino IDE installation folder.
    (usually C:\Program Files\Arduino IDE or C:\Users\<user name>\AppData\Local\Programs\Arduino IDE).
  3. In the folder listing of the Arduino IDE installation folder, hold the Shift key while clicking the right hand button on the mouse.
  4. From the context menu, click "Open PowerShell window here".
    Windows PowerShell will now open with the current directory set to the Arduino IDE installation folder.
  5. Type the following command:
    & ".\Arduino IDE"
  6. Press the Enter key.
    Debug output should now be printed to the PowerShell window as the Arduino IDE starts.
  7. Wait for the Arduino IDE to finish starting.
  8. Compile a sketch (twice if necessary) to get that "No connection established" error.
  9. Switch back to the PowerShell window.
  10. Right click on the title bar of the PowerShell window.
    This will open a context menu.
  11. Select Edit > Select All from the context menu.
    This will select all the text in the PowerShell window.
  12. Press Ctrl+C.
    This will copy the contents of the PowerShell window to the clipboard.
  13. Open a forum reply here by clicking the Reply button.
  14. Click the </> icon on the post composer toolbar.
    This will add the forum's code block markup (```) to your reply to make sure the error messages are correctly formatted.
    Code block
  15. Press Ctrl+V.
    This will paste the output into the code block.
  16. Move the cursor outside of the code block markup before you add any additional text to your reply.
  17. Click the Reply button to post the output.

In case the output is longer than the forum software will allow to be added to a post, you can instead save it to a .txt file and then attach that file to a reply here:

  1. Open any text editor program.
  2. Paste the copied output into the text editor.
  3. Save the file in .txt format.
  4. Open a forum reply here by clicking the Reply button.
  5. Click the "Upload" icon (image) on the post composer toolbar:
    image
  6. Select the .txt file you saved.
  7. Click the Open button.
  8. Click the Reply button to publish the post.

Alternatively, instead of using the "Upload" icon on the post composer toolbar as described in steps (5) - (7) above, you can simply drag and drop the .txt file onto the post composer field to attach it.

Please let me know if you have any questions or problems while following those instructions.