Your reason for not switching to the 2.x IDE ?

[ptillisch]

@GoForSmoke

it made SIGNIFICANTLY SLOWER SKETCHES FROM THE SAME SOURCE 1.6.whatever.

Please do this:

1. Select File > New Sketch from the Arduino IDE 2.x menus.
2. Select File > Preferences... (or Arduino IDE > Settings... for macOS users) from the Arduino IDE menus.
   The "Preferences" dialog will open.
3. Check the box next to "Show verbose output during: ☐ compilation" in the "Preferences" dialog.
4. Click the "OK" button.
5. Select Sketch > Verify/Compile from the Arduino IDE menus.
6. Wait for the compilation to finish.
7. Right click on the black "Output" panel at the bottom of the Arduino IDE window.
8. From the context menu, click Copy All.
9. Open a forum reply here by clicking the "Reply" button.
10. Click the <CODE/> 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.
    
    
11. Press Ctrl+V.
    This will paste the compilation output into the code block.

Now repeat the above process, but this time using the 1.x version of Arduino IDE.

Please also tell us exactly which version of Arduino IDE 2.x and 1.x you are using.

---

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 () on the post composer toolbar:
   
   
   
   A dialog will open.
6. In the dialog, 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.