Have designer's notebook I've used (template I devised) for three years. Now all of a sudden, irrespective of any particular update/change of software (or so I think), the TOC won't update. I'm specifically saying that it won't pick up my latest date (done as a "normal" style, and seemingly same as those TOC entries that DO still work).
As I said, each day is a heading done in "Normal" style, and up until May 5th, the TOC updated fine. After that, it simply isn't updating the TOC. Whether I:
1) update in the "Update Table" tool embedded in the "Contents" header, be it the page only or the whole table option...no changes, or
2) Go to the "References" tab and select "Update Table".
...it is the same result, NADA.
I at first thought maybe I'd exceeded the number of entries, so copied out and started a new file from the original template, pasting in all entries since the start of my second year here at my employer's. This made no difference (last update still May 5th entry). I've even made sure that the present file, smaller and newer than the original, is not saved in "compatibility mode."

Thanks for any recommendations.

Jeff