I have been trying to create a Microsoft Word 2016 Master Document for embedding multiple sub-documents following this instruction.
But after adding a sub-document I cannot save the master document. When I use the "save as" dialog no file gets created. When I create a master.docx file first and add any sub-document no changes are written to the master.docx. I have tested it with different sub-document files, but saving never works.
How can I save a master document?