[Gmsh] versions higher then 1.53 do not work

[Christophe Geuzaine]

Alfonso Medina wrote:
> When I try a large OpenFlower .pos file it will start to load the 
> velocity fields one step at a time, then it slows down to the point 
> where it just hangs. I'm not sure if it just needs more time (hours on a 
> 3GHZ 2.5gig computer with excellent CAD opengl rated card). 

Is the display (redrawing) really slow, or just the file reading part?

- If it is the display and if you use 3D arrows to represent the
velocity field, could you try using "simpler" arrows (e.g.
View.VectorType=2;) and let me know if it makes a  difference?

- If it is the file reading part, then it is probably due to the fact 
that you are using ASCII files--and cygwin is atrociously slow when 
reading ASCII files (I have no idea why). Could you retry after 
converting your .pos file in binary format (you can use "gmsh -convert 
file_ascii.pos file_binary.pos" to do that)?


> In any case, 
> I use the cygwin1.dll that comes with the download. What is so special 
> about it that you would want to keep an older version?

Just to see if a newer cygwin is the cause of Milan's problems...



> 
> Alfonso
> 
> 
> Christophe Geuzaine wrote:
>> Alfonso Medina wrote:
>>> I have gmsh running on an XP machine that recently got the service 
>>> pack. I use the latest binary version and it works ok. I find that it 
>>> will hang on large files. Other than that, it works great. What I do 
>>> is to 
>> Interesting: could you tell me a bit more about when it hangs? (Does it
>> happen when you load large post-processing files or large meshes? In
>> binary or ASCII format?)
>>
>>
>>> save GMSH and the  flow solver I use, OpenFlower in  a USB pen drive. 
>>> I then use a Knoppix CD to run linux on my machine. It works 
>>> fantastically. Night and day between cygwin and a real linux on CD. 
>>> Knoppix works. Ubuntu live CD also runs GMSH but not OpenFlower 
>>> because the CD comes without some deps.
>>>
>>> What is your experience between gmsh binary and gmsh compiled? I 
>>> notice no difference.
>>>
>>> Alfonso
>>>
>>>
>>> milan.hokr at email.cz wrote:
>>>> Me and my colleagues have problems with running GMSH on Windows XP. 
>>>> If I try to run gmsh.exe, nothing happens (or the application start 
>>>> and immidiately ends). I guess this problem arised after installing 
>>>> Service pack 2 in Win XP. And it happens for version from 1.53 (with 
>>>> cygwin1.dll of larger size 1.1M instead of 0.9M in older version).
>>>> I did not find any other cygwin*.dll file in my system.
>>>>
>>>> Is there anybody with this problem. How to solve it?
>>>>
>>>> Thank you
>>>> Milan Hokr
>>>>
>>>> _______________________________________________
>>>> gmsh mailing list
>>>> gmsh at geuz.org
>>>> http://www.geuz.org/mailman/listinfo/gmsh
>>>>
>>>>
>>>>   
>>>
>>
> 
> 


-- 
Christophe Geuzaine
Assistant Professor, Case Western Reserve University, Mathematics
http://www.case.edu/artsci/math/geuzaine