Subsequent mm rests of a mm rest = 1 can't be stretch if minimum of empty measures is set to 1

Press M to toggle multi-measure rests.

Create full measure rests, ie Ctrl + A -> Ctrl + Shift + Del. (https://musescore.org/en/handbook/measure-rests#create-measure-rests), then press "M", and it's done: 1 Missa No.14 Horn I.mscz
In the future, please use first the forums support for such question.

EDIT: I thought it was necessary to create full measure rests by testing the file the first time. In fact, no, just "M". I was not yet fully awake probably!

Indeed, there seems to be something wrong in this score, although I can't tell what. But if I enable multimeasure rests, I find most of them won't stretch, nor will text attached to them move.

BTW, I notice you have multiple text elements attached to the same empty measure in places. The algorithms for laying out text in multimeasure rests don't deal too well with that. It seems you have used system text for your movement titles, better to use frames (either vertical or text) for this. But this isn't the problems; it occurs even in measures with only a single text element. I've never seen this before. This remains true even if I delete the text and re-add it.

Anything unusual you can think of about how this score was created? Only thing I can see that is odd offhand is that the "empty" measures are not truly empty - they contain actual duration rests rather than the default full-measure rests. This leads me to suspect the score was imported from another source. Not that this in itself would explain anything.

Hmm, your score doesn't have any multimeasure rests. And if those are switched on, I can stretch many of them but indeed not all.
What text associated with them can't you move?

Copnverting all rests to full measure rests and I can stretch all multi measure rests.

Here is what I was able to reproduce:

1) open score
2) press "M"
3) navigate to page 4
4) select first mmrest of Benedictus
5) press "}" as oiften as you like

Result: nothing

Now,

1) Select the "Allegretto" text above it
2) try to move it using Inspector, arrow keys, or drag

Result: nothing

I then tried turning multimeasure rests off again, deleting the duration rests and text, inserting new staff text, then enabling multimeasure rests again. No change: stretch doesn't work, nor does

The thing that is still odd about this score is that it appears to be be one part from a full score and appears to have links to that effect, but of course the rest of the score is missing. Was this generated from a full score using File / Parts and then saved to a separate file?

As for the full measure rests, it is still easier to keep these than to enter duration rests. Instead of selecting the duration and then pressing 0, simply press right arrow twice, or Ctrl+arrow once. Results will be better in general. But it won't fix this problem.

But, indeed, with JoJo's version in which all duration rests were replaced with full measure rests, everything does work - stretch as well as text. Very odd, and I cannot reproduce that result from scratch. So something else must be going on...

Version 2.3.2 / Windows10

1) Create a new score, and fill with notes and some empty measures, a few with a single empty measure.
The test file at this step: mm test.mscz

2) In Style -> General -> Tick "Create multimeasure rests", and set the "Minimum number of empty measures to 1" -> Ok

3) Increase or decrease the stretch of the two first MM rests (displaying 2 and 1, on first system)
Result: works as expected

4) Try the same thing with the subsequent mm rests (ie after the first mm rest displayed "1")

Result: failure

Very former issue. I can reproduce in June 2014.
Fortunately, the 3.0 dev. is not affected by this issue.

Ah, yes, setting the minimum mm rest to 2 was my first change.
As there won't be further 2.x fixes and master isn't affected I guess we should close this

Even there is no more fixes for 2.x, it's not fixed at all.
It will remain active with all 2x versions, for ever...

It is fixed in 3.0 though

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