Very odd behavior when trying to drag hairpin handle to the left

• Aug 14, 2020 - 13:21

Hairpin-line Problem.gif

As you can see in the above gif, there's quite an odd bug that causes the end of the hairpin to shoot off to the right when trying to drag it to the left. For what it's worth, this also happens with other types of lines as well (regardless of whether "automatic placement" is on or off).

I suspect this has to do with the new dragging line handle behavior introduced in 3.5, since I haven't experienced this bug until now. But, I don't have a single clue on how to reproduce the bug. It seems to happen randomly in various parts of the score. (It's also worth mentioning that trying to do the same thing in the same measure in other instruments results in the same weird behavior.)

In the attached score, go to measure 223 (bar 4 on page 33). This is one of the problem measures. I know I've experienced this other times, but this specific measure is the only one that I clearly remember.

Also, there doesn't seem to be a workaround, as using the arrow keys produces a similar result.

Should an issue in the tracker be created?

OS: macOS 10.15, Arch.: x86_64, MuseScore version (64-bit):, revision: 43c5553

Attachment Size
On_Leather_Wings Orchestra.mscz 664.56 KB


That's wild! It does the same thing on my windows system.

I'll do more testing, but somehow it seems related to the tempo change immediately after the measure. It doesn't do this on the next measure of the same staff, but it does on the bass clarinet (with only a measure rest) in the same measure as the oboe.

I think you should create an issue to get the attention of certain people who pay more attention to the issue tracker and it is a bug that needs fixed.

I saw your bug report so that's good. I did some testing trying to recreate the issue from scratch with no success so I started deleting items in mm222 - 224 to see if any of them are the culprits, but there was no change in results. I suspect it will end up being some apparently unrelated item added in some obscure measure we never considered. @cadiz1 is a trouble shooting genius and has found the causes of bugs like this before. Hopefully he or someone else can figure out the problem.

In reply to by mike320

Been doing some testing as well; it seems to happen only on the bar before a time signature change. I've got another project I'm working on with a lot of time signature changes, and it became pretty clear there. The bar after a time signature change is fine, but the bar before seems to cause issues. But what's really weird is that the measure width seems to have something to do with it.

For example, the problem happens in m. 26 and 27, but not 28. In measure 46 and 47 (both smaller-width measures), the problem doesn't seem to be there at first, but moving the handle back to the right after moving it to the left produces more weird results. Other times it happens are at measures: 48, 58, 59, 95, 107, 108, 119, 177 (this is one that looks fine at first, but starts acting weird upon further fiddling), 199, 200, etc. All before time signature changes.
However, I do find it interesting that the bar after the original measure, bar 224, doesn't seem to suffer from this problem even though a change to 4/4 comes after it. 4/4 is an exception in some places, but not others?

In reply to by David McCaulley

I deleted the time change and time signature in m224 and tried dragging with the same weird results, so I discounted that as the sole reason for the behavior. One thing I did not do is save (actually save as so I can keep the bad score) and reload after making my modifications. This may seem irrelevant, but save and reload often fix problems like spurious key signatures being displayed, why would it be impossible for the save and reload to change the behavior of dragging an endpoint?

In reply to by Marc Sabatella

Thank you to everyone that took their time to view this issue. Here is the completed version of Agnus Dei without lyrics for anyone curious. This version was done to the best of my ability in 1/4 comma mean-tone temperament at A= 435Hz. I wish there was a way to change the temperament of a piece easily by just selecting the key desired and everything would be automatic.

Attachment Size
Agnus_Dei.mscz 47.59 KB

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