I want to open a notebook file which was created in another verson but I can't. This type of error message is displayed. Can any one help me to solve this problem?
Mathematica sometimes has difficulty with special characters in file paths or file names. (Note the "??"s in the message.)
If you copy the notebook into a directory with only Latin letters in the path, and rename it to to something simple, can Mathematica open it?
Thank you very much for your kind suggestion. Following your guideline I can open my notebook.