Re: Kernel crash, version 7.0, windows XP, when using slider in Manipulate with Dynamics plot on control area

*To*: mathgroup at smc.vnet.net*Subject*: [mg109396] Re: Kernel crash, version 7.0, windows XP, when using slider in Manipulate with Dynamics plot on control area*From*: "Nasser M. Abbasi" <nma at 12000.org>*Date*: Sun, 25 Apr 2010 06:23:58 -0400 (EDT)*Reply-to*: "Nasser M. Abbasi" <nma at 12000.org>

An update: I found a fix. When I use SynchronousUpdating -> True the problem went away! Kernel does not crash any more. I normally use SynchronousUpdating ->False in Manipulate, but I have not used Dynamic plots inside the control variable area before, so never seen this problem before. I left the problem notebook here http://12000.org/tmp/bug_input_slider/ with the name filter_v9.nb and put next to it the notebook with this change in the code, called filter_v10.nb in case someone from WRI or others like to look at this. Even if it is a user error, I do not think the kernel should crash? For me, I am Ok now, I found a workaround, even though I really do not understand what is the problem here when I use SynchronousUpdating ->False in this case. It will be good to know what was causing the crash if possible. --Nasser > > I was wondering if someone has a real Mathematica debugger that they could > use to help me find where this bug is? I do standard mathematica. > > I spend the last 6 hrs on this, and can't find the problem. I do not have > a debugger, so it is impossible to find where the bug is since it is a > kernel crash and I do not see what I am doing wrong. One thing I know is > that if I all the Epilog code in the code, the problem goes away. > > This is the problem: > > I have a manipulate, with a plot being drawn using Dynamics in the control > area. The plots uses control variables. > > When I enter a value of a control variable using the slider (i.e. normal > method) there is no problem. no crash, even though the slider goes over > the same input value which will cause a crash when I enter this input as > follows: > > I open the slider by clicking open on the small "+" next to the slider, > and type in a numerical value, the kernel crashes. > > For example, There is a control variable called zeta in the program. When > I move the slider no crash happens. When I open the slider window and > type in a value then the crash happens. The strange thing, if I type in > "1" instead of "1.0" then it will crash, but if I type "1." no crash is > seen (i.e. add a decimal point !) > > I have a screen shot here to help you see the problem: > > http://12000.org/tmp/bug_input_slider/screen_shot.png > > And the notebook is in the same folder, here: > > http://12000.org/tmp/bug_input_slider/ > > it is called filter_v9.nb > > All what you have to do just download the notebook, open it in > Mathematica, open the slider input area just like shown in the above > image, and type in 1 > Next, simply hit any other control with the mouse to activate, now the > kernel will crash. > > As I said, if I type 1. instead of 1 (i.e. with a decimal point), the > problem does not happen. > > Any one has version 7.0.1? does the problem happens with it also? > > Thank you, > --Nasser >