ChemDraw: Error reading CDXML document at line XX: not well-formed or invalid token

Error reading CDXML document at line XX: not well-formed or invalid token

Open the CDXML file with a text editor like Notepad ++ (Notepad++ lets you locate the error by the line number).

Look for a superscript “L” in the document and replace it with a space. If using Notepad++, you will see the letters ETX in a black background instead (easier to find).

You may also find other kind of text, but it will always include special characters like ¦ here:

(A????????????A??????????A?????????A????????A???????A??????A?????A????A???A??A?Ac?A??????????A?????????A????????A???????A??????A?????A????A???A??A?A¦A????????????A???????????A??????????A?????????A????????A???????A??????A?????A????A???A??A?A2)

Mac users who do not have access to Notepad++ can also use Komodo Edit (free) to find the correct line number.

Save the changes and try to open the file again with ChemDraw/ChemBioDraw