[Mrtrix-discussion] memmory-mapping failed massega

[Danilo Scelfo]

Hi Donald,
thanks for your quick reply.

As I run the command with the -debug option I noticed the file I was working
with was read-only and finally I realised it was just a matter of file
permissions... So, issue solved. Thanks for hint.

Danilo



On 3 October 2011 03:01, Donald Tournier <d.tournier at brain.org.au> wrote:

> Hi Danilo,
>
> This is really strange, given that the same code works on the same OS
> running under a different virtual machine... The only reason for the memory
> mapping to fail with this particular error is that the file size is too big
> - all other reasons would also cause problems on other systems. How big are
> the files that you're trying to load or generate? Can you increase the
> amount of memory reserved for the virtual machine?
>
> Otherwise, other suggestions are to post the output of the command when
> running with the -debug option, and also post the output of "mrinfo
> DWIecc.nii" so we can check the original file size & parameters.
>
> As a last option, you could just wait a little until I release the next
> version of MRtrix (soon), which will include instructions for compiling
> natively on MacOS X...
>
> Cheers,
>
> Donald.
>
>
>
> On 30 September 2011 20:15, Danilo Scelfo <danilo.scelfo at gmail.com> wrote:
>
>> Hello to moderator,
>> the following should be a reply to the message of * Donald Tournier* *Mon
>> Jun 20 17:55:33 PDT 2011*
>>
>> Hello,
>>
>> I'm experiencing a similar issue using the command:
>>
>> dwi2tensor DWIecc.nii -grad /path/to/encoding64dir.b3000.txt tensor.mif
>>
>> and getting the error:
>>
>> dwi2tensor: memmory-mapping failed for file "./tensor.mif": Invalid
>> argument
>>
>> I'm running MRtrix on a virtual Linux Ubuntu 10.04 64bit machine on a
>> guest Mac OSX 64bit system.
>> The same commands were correctly running on a virtual Linux Ubuntu 10.10
>> 64bit machine on a guest CentOS 5.5 64bit system.
>> Could the different Ubuntu version be the cause? Gradient file is
>> correctly formatted as I'm able to perform tractography using the same file
>> with streamtrack.
>>
>> Can you help me with such a issue?
>> Thanks in advance,
>>
>> Danilo Scelfo
>>
>>
>>
>> *
>>
>> ***
>> _______________________________________________
>> Mrtrix-discussion mailing list
>> Mrtrix-discussion at www.nitrc.org
>> http://www.nitrc.org/mailman/listinfo/mrtrix-discussion
>>
>>
>
>
> --
> Jacques-Donald Tournier (PhD)
> Brain Research Institute, Melbourne, Australia
> Tel: +61 (0)3 9035 7033
>
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