Ideas? A document that is in progress suddently won't allow me to save it. Also is sluggish... importing graphics and moving from page to page, etc. Have experimented by opening other Indesign docs and creating a new one, they all seem to act the same. Cannot save them. Can manipulate data within the doc, although very slow and sluggish, but cannot save. HELP!
See Remove minor corruption by exporting for instruction on making a .idml file that you can reopen. If that fails, sometimes force quit and restart ID will open usable recovery data that you then Save AS.