Breakpoints unpredictable in R2011a

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Robert
Robert 2011-4-21
Since upgrading to R2011a, breakpoints in my code are unpredictable. Sometimes they work, and sometimes they don't. My code worked fine with breakpoints in R2010b. I don't have any "clear all" statements, and the breakpoints are still visible as red dots in my code. The code I'm using is on the MATLAB path, and there is only one copy.
Anyone else having difficulty with breakpoints in this latest release? Even better, anyone know how to fix it?
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Oleg Komarov
Oleg Komarov 2011-9-5
This thing is starting to annoy me as well
What I do is:
click to clear > click to place the breakpoint back > save .m file
Richard Crozier
Richard Crozier 2012-4-25
This is frankly, outrageous, yet true!!

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采纳的回答

TB
TB 2011-9-21
The official word I got from The Mathworks is that it is fixed in R2011b, but no workaround for R2011a.
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Robert
Robert 2011-9-22
Agreed. Suppose I only have 2011a, without money to buy a new release. Then I'm stuck with a buggy, useless program. If Mathworks sells me software with a bug, they should not then tell me, "Oh, by the way, if you want this to work correctly you have to pay even more."
Daniel Shub
Daniel Shub 2011-9-22
While I am all for venting and in my opinion it is fine to vent here, nobody who can do anything is listening (not quite, but you get the idea). Go through the official channel of customer support to let them know how you feel.

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更多回答（5 个）

Alexander Kosenkov
Alexander Kosenkov 2011-8-31
Extremely annoying bug, since R2011a. Breakpoints have their own lives, regardless of user actions. Just doesn't work.
As workaround, sometimes, it helps to modify file (add and remove space) and then saving it again. Otherwise I have to restart Matlab (obviously loosing all breakpoints). Clicking 'Clear all breakpoints in all files' and then setting breakpoints again - does not help for me.
Anyone here from Mathworks to comment?
  1 个评论
Robert
Robert 2011-8-31
This bug makes the R2011 versions useless to me. Maybe it's my own fault for writing software that needs debugging in the first place, but until the debugging feature works properly I'm sticking with R2010b.
Would love to know when the issue is fixed, if indeed it is a known issue as Friedrich claims above.

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Andreas Goser
Andreas Goser 2011-9-22
One user pointed me to this thread, as we were discussing aspects of the development timelines and fixing bugs. Indeed, MathWorks fixes bugs in the release under development and not by default for all affected older releases. But certainly, it is possible. And it happens. Please see the recent Service Pack releases. Those are responses on a number of (typically significant) bugs. In short, this is dependent on impact, frequeny and whether accpetable workarounds are available or not. I can just encourage you to describe the impact to Technical Support, so that they can provide this information to Development. You may think the impact is obvious? It is not.
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Walter Roberson
Walter Roberson 2011-9-22
This is the first I have heard of the service pack releases ??
Jan
Jan 2011-9-22
@Walter: Go to http://en.wikipedia.org/wiki/MATLAB and look for the "Release history". There are 2 SPs sincs 2006.

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Lucas García
Lucas García 2011-8-31
Hi Robert,
I haven't been able to reproduce this issue, but I have heard it from other users, so that makes it empirically a possible bug in R2011a. In any case, I will recommend that you report it to the Technical Support team mentioning your problem with as much detail as you can.
When you are debugging and type dbstatus, are the true breakpoint lines listed?
As a possible workaround, I will try the following:
>> feature accel off
>> feature jit off
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Jan
Jan 2011-9-22
It cannot be called "workaround" to disable the JIT acceleration. Some of the loops will need 100 times more processing time, such that a program can become completely useless even if it only concerns the debugging.

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Sean de Wolski
Sean de Wolski 2011-4-21
Are you calling it in cell mode by clicking "Evaluate Cell"?
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Jan
Jan 2011-6-8
Any CLEAR ALL hidden in a subfunction?!
SK
SK 2011-6-9
Definitely no CLEAR ALL in my code. And the file is writable, too.

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Adam
Adam 2012-5-2
I didn't know this, maybe everyone else did...
The Matlab statement:
clear all
clears breakpoints. So if you have "clear all" in your script, any breakpoints after that line will be cleared before script execution reaches them, so Matlab won't break. Getting rid of this line was the solution in my case, but it may not work in every case.
[opinion] this functionality is DUMB and should be fixed. [/opinion]
  2 个评论
Robert
Robert 2012-5-2
Quote from original post:
> I don't have any "clear all" statements
The solution was to stick with R2010b, or to wait for R2011b.
But agreed, it would be nice to have a "clear all but breakpoints" command.
Jan
Jan 2012-5-2
Has this problem been fixed in the service pack2 for 2010b?

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