[Mrtrix-discussion] Sreamtrack error

Tue May 7 16:45:42 PDT 2013

Hi Matteo,
To add my two cents, if what you are interested is in doing TDI, then you
can just break your tracking in smaller chunks and then use mradd to add
the TDIs. In other words, (for example) the results for these 2
cases should be exactly the same:
1) create 5M tracks and then do TDI of the 5M file, or
2) create 5 separate 1M track files, create their 1M TDIs, and then add the
5 TDIs.
So, although this doesn't solve the problem of the 2GB limit you have, it
is just a work around for the specific case of TDI :)
In fact, that is exactly what I do when I have to decide how many tracks to
use for a given super-resolution (I keep on adding extra TDIs, until I get
to a contrast-to-noise ratio that is okay for my application).
Good luck!
Fernando

----------------------------------------
*A/Prof. Fernando Calamante*
The Florey Institute of Neuroscience and Mental Health
Melbourne Brain Centre - Austin Campus
245 Burgundy Street
Heidelberg, Victoria 3084
Australia
Ph: (+61 3) 9035 7041
Fax:   (+61 3) 9035 7307
Email: fercala at brain.org.au

On Tue, May 7, 2013 at 6:21 PM, Matteo Diano <matteo.diano at gmail.com> wrote:

> Hi Jeurissen and Donald,
> thank you very much for your helpfulness. I am going to try to install
> MRtrix in Centos.
> Cheers
>
> Matteo
>
>
>
> 2013/5/7 Jeurissen Ben <Ben.Jeurissen at ua.ac.be>
>
>>  As Donald explained, MRtrix on Windows is compiled as a 32-bit
>> executable. A default 64-bit Windows installation will only allow you to
>> address 2 GB of ram (
>> http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx).
>> This is why streamtrack fails as soon as your file reaches 2GB of size.
>>
>>  A 64-bit Windows executable would solve this issue, but unfortunately I
>> haven't been able to get the visualization part of mrtrix working properly
>> in a 64-bit version on Windows...
>>
>>  Currently, the only way around this is to use the 64-bit Linux or MacOS
>> version.
>>
>>  Hopefully, future releases will include a 64-bit version on Windows.
>>
>>
>>
>>     ------------------------------
>> *From:* mrtrix-discussion-bounces at public.nitrc.org [
>> mrtrix-discussion-bounces at public.nitrc.org] on behalf of Matteo Diano [
>> matteo.diano at gmail.com]
>> *Sent:* 07 May 2013 09:37
>> *To:* Donald Tournier
>> *Cc:* mrtrix mailinglist
>> *Subject:* Re: [Mrtrix-discussion] Sreamtrack error
>>
>>    Hi Donald,
>>  thank you for your answer. I am working on SSD formatted in NTFS with
>> 16G of RAM and the size of the file is around 2G. So I have no idea about
>> this issue.
>>  Cheers
>>
>>  Matteo
>>
>>
>> 2013/5/7 Donald Tournier <d.tournier at brain.org.au>
>>
>>> Hi Matteo,
>>>
>>>  Sounds to me like you've hit a file size limit. What is the size of
>>> the tracks file when it fails? It might be due to the 32-bit 4GB boundary
>>> (MRtrix on Windows is compiled as a 32-bit executable, as far as I know),
>>> but it could also be due to a limitation of your filesystem. Are you
>>> writing the tracks to a NTFS partition, or a FAT partition? If the latter,
>>> you'll definitely encounter issues like you describe...
>>>
>>>  Hope this helps,
>>>
>>>  Donald.
>>>
>>>
>>>
>>>
>>>  On 7 May 2013 16:49, Matteo Diano <matteo.diano at gmail.com> wrote:
>>>
>>>>    Dear MRtrix experts,
>>>>  I tried to use streamtrack SB_PROB to obtain the whole brain tracking
>>>> to fed into the TDI processing (so more than 1 million fibers). Every time
>>>> I got this error: "973180 generated,   772168 selected    [
>>>> 19%]streamtrack: error writing to tracks file: Invalid argument". I tried
>>>> to change data but i had the same problem and it always stops around 18
>>>> percent. I am using MRtrix on win 7 64b.
>>>>  Thank you very much!
>>>>  Regards
>>>>
>>>>  Matteo
>>>>
>>>>
>>>>  _______________________________________________
>>>> Mrtrix-discussion mailing list
>>>> Mrtrix-discussion at www.nitrc.org
>>>> http://www.nitrc.org/mailman/listinfo/mrtrix-discussion
>>>>
>>>>
>>>
>>>
>>>  --
>>> *Dr Jacques-Donald Tournier
>>> *
>>> Research Fellow
>>>
>>>  The Florey Institute of Neuroscience and Mental Health
>>> Melbourne Brain Centre - Austin Campus
>>> 245 Burgundy Street
>>> Heidelberg  Vic  3084
>>> Ph:  +61 3 9035 7033
>>> Fax:  +61 3 9035 7307
>>> www.florey.edu.au
>>>
>>>
>>
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