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Re: hang --"going backwards in time; " "insane spring distance requested

From: Mats Bengtsson
Subject: Re: hang --"going backwards in time; " "insane spring distance requested"
Date: Tue, 27 Nov 2007 14:58:16 +0100
User-agent: Thunderbird (X11/20070716)

The same problem was discussed some year ago on this mailing list
(or maybe on bug-lilypond), see the archives.


Ed Ardzinski wrote:

I did some playing last night and was surprised that you can have any denominator for a time signature, so my initial idea is wrong...not that I really understand what 5/9 time would really mean, but obviously LP interprets it.

Since it seems to be a lot of code that causes this, perhaps you have to experiment with whittling down the code to isolate the offending commands. I'd be interested in seeing some of the code that uses these odd times. Maybe there is a math error, and another set of eyes and fingers on a calculator can see it.

    From: address@hidden
    To: address@hidden
    Subject: RE: hang --"going backwards in time;" "insane spring
    distance requested"
    Date: Mon, 26 Nov 2007 23:09:12 +0000

    Is 11748 a legit denominator for a time signature?
2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192,
    16384...I am a pretty basic writer, so I've never gone beyond time
    sigs like 13/16.

    Have to admit the error message text is cute.


    > Date: Mon, 26 Nov 2007 13:46:00 -0800
    > From: address@hidden
    > To: address@hidden
    > Subject: hang --"going backwards in time;" "insane spring
    distance requested"
    > Hi all,
    > I'm using some complicated time signatures, like 3599/11748 followed
    > by 2667/25276 followed by 177/568, etc. (I have a good reason
    for this).
    > They render nicely for nearly ten pages or so of music, and then
    > suddenly adding an additional "strange" time signature causes two
    > programming errors:
    > The first comes before drawing begins.
    > "going backwards in time, trying to freeze in time . . ."
    > The second comes during drawing.
    > "insane spring distance requested, ignoring . . .cross fingers"
    > Then lily hangs -- it keeps spinning forever.
    > I'm using Lilypond 2.11.34 on a Mac PPC (it also breaks the same
    > way in 2.11.35).
    > I checked my arithmetic many times -- the strange time signtaures
    > eventially lead to a sync-up with aother part in 3/8 meter --
    and the
    > math is correct. It seems to be a problem that happens when actually
    > drawing the page.
    > Any clues or similar experiences?
    > Best,
    > Adam
    > _______________________________________________
    > lilypond-user mailing list
    > address@hidden

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        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Phone: (+46) 8 790 8463                         
       Fax:   (+46) 8 790 7260
        Email: address@hidden

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