File > Save Selection… leads to corrupt score if selection is not 4/4 and does not start with time signature

Because for saving a selection, you have to "protect", before the selection of the extract (last system, page 9) the time signature, by adding one (so 3/4) at your score, ie at rehearsal 21.

See the result: selection.mscz

I don't think it's expected but I can confirm that Save selection is very "literal". Meaning it saves the actual selection, doesn't add time signature or key signature. It just dump the xml representing the current selection in a new mscz file... possibly it should become smarter but there is nothing done currently.

A score with no time signature is assumed to be 4/4.

I didn't try it but it's probably the same for key signature, maybe even clef...

See https://github.com/musescore/MuseScore/pull/3048

Fixed in branch 2.1, commit 0299f2d947

fix #99146: File > Save Selection… leads to corrupt score if selection is not 4/4 and does not start with time signature

Fixed in branch 2.1, commit a062decc3f

Merge pull request #3048 from lasconic/fix-99146-21

fix #99146: File > Save Selection… leads to corrupt score if selectio…

Fixed in branch master, commit 752bafc8e9

fix #99146: File > Save Selection… leads to corrupt score if selection is not 4/4 and does not start with time signature

Automatically closed -- issue fixed for 2 weeks with no activity.

Seems this problem is back, see #276295: Save selection defaults to 4/4 time signature, but no display