Calc save button has become grayed out

I’ve been using a Calc doc for weeks and today the save button has become greyed out. Ctrl+S also not working.
Only option available seems to ‘save as’ to create copy or close and ‘save changes’ at that point. Doc is not ‘read only’

When new Calc doc created to test, Save button also greyed but Ctrl+S did work

Any ideas how to restore save button operation gratefully received, thanks

Windows 8, English

Hit “save as”. A box will appear asking you whether you want to save the document you’re working on with the name of that very document. Hit “save.” You’ll be asked if you want to replace the document that already has that name (which, of course, is the very document on which you’re working). Click “yes” and you’ll wind up with the same result you would have received had you been permitted to use the unfortunately grayed out “save” button.

The same problem exists in LO Writer. It apparently has nothing to do with permissions. I do notice that in both programs if you make most changes (I obviously haven’t made all possible changes), the “save” button again becomes workable. I’ve made a whole variety of alterations in both Writer and Calc and in both any change made so far results in the save button then coming to life.

If my observations are correct (and not the result of hallucinations) I think I’m starting to understand what happens. As with other people, over thirty years of daily professional computer use I’ve become a compulsive “saver.” Certainly whenever I decide to close a document or program for whatever reason then without thinking or even having made a change I’ll automatically try to save what I’ve been working on. I won’t even be thinking about it and I certainly won’t be trying to remember whether I’d made a change since the last time I saved the document.

LO Writer and LO Calc may (logically) take it for granted that after an item has been saved it’s no longer necessary to have the ability to save it until a further change is made. Of course, while that’s logically correct, it overlooks the fact of limited human short-term memory as well as the effects of preoccupation while one is multitasking. It would be just as easy and simple for code writers to permit a person using a document to save it multiple times without changes having been made, just to be safe. The computer operator would then not have to try and consciously remember whether or not a document (which has probably been changed and saved many, many times before by that same person) has been changed before the last save.

Because of the workaround this issue may have a very low priority for those who deal with bugs and fixes. I’m posting this because not being able to save bothered me as it has others. For those who also come up with this as a problem, I hope this helps!

“It would be just as easy and simple for code writers to permit a person using a document to save it multiple times without changes having been made, just to be safe.”

Tools > Options > LibreOffice > General. Click the check box for “Allow to save document even when the document is not modified.”