[Mrtrix-discussion] Is there a upper limit of the maximum fibers to generate

[Robert Smith]

Hi Dan

I've only heard of this error occurring once before.
I'm going to take a stab in the dark and guess that you're running MRtrix
on Windows? If so, you're very much better off running the Linux version of
MRtrix from inside a virtual machine. Not only should it remove this error
(which is caused by Windows not properly freeing used memory and hence your
system running out of RAM), it should also run faster.
In addition, it's preferable to use a 64-bit operating system, even if you
don't have > 4GB of system memory; it just gives the system more freedom in
the way it allocates and manages memory.

In case you're curious; I wouldn't expect MRtrix to run into issues with
having too many streamlines until it reaches 32-bit integer overflow, which
will happen at about 2-4 billion streamlines.

Best regards
Rob



--

Robert Smith
PhD Candidate

The Florey Institute of Neuroscience and Mental Health
Melbourne Brain Centre - Austin Campus
245 Burgundy Street
Heidelberg Vic 3084
Ph: +61 3 9035 7128
Fax: +61 3 9035 7301
www.florey.edu.au



On Wed, Dec 19, 2012 at 8:12 AM, Dan Wu <dwu18 at jhu.edu> wrote:

> Dear MRtrix expert,
>
> I am using mrtrix probabilistic fiber tracking to generate a large amount
> of fibers for TDI. It seems there is a limit of maximum number of fibers to
> generate, even if I set -maxnum to  0, which suppose to remove any limits.
> I can at most track ~1 million fibers, and the program will stop itself.
> For example, I'll get an error message like this
>
> 966676 generated, 920298 selected [ 9%]
> This application has requested the Runtime to terminate it in an unusual
> way. Please contact the application's support team for more information.
>
> Do you have a clue about this problem? Thanks!
>
>
> Regards,
>
> Dan
>
>
>
>
> --
> Dan Wu
>
> PhD Candidate
> Department of Biomedical Engineering
> Johns Hopkins University
> email: dwu18 at jhu.edu
> phone: 443-564-9191
>
>
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>
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