I received a .docx document from a fellow student which I can open but not save again even when I have made no edits whatsoever. When I press Save As the dialog appears, I write in a file name and press Save. The dialog now reappears and there is a empty Word file created with the file name I gave.
Any suggestions on how to recover my document?
P.S. It seems to be every file I get from this student and that equations are causing the problem but only some blocks of equations. If these are deleted the file becomes saveable.