Hi Su,

I suggest that you review the output log files. The slices that have  
failed should have an error message inside (probably because an excess  
of some limit).

Cheers,
Moises.

Quoting "Glasser, Matthew" <[email protected]>:


Do you know that your cluster is not killing some of the jobs?  Which
slices are missing?  If it is mainly the middle ones, I'd suspect that
they are exceeding some limit for the cluster.

For HCP data you can successfully model 3 fibers (--nf=3) and should
use the -g option with FSL 5.0.5.  I'd leave fudge and bi at their
defaults unless you have a reason to change them.  --model=2 is
correct.

Peace,

Matt.

FROM: Huang Su-Chun <[email protected]>
DATE: Wednesday, October 16, 2013 4:27 PM
TO: Matt Glasser <[email protected]>
CC: Stamatios Sotiropoulos <[email protected]>,
"[email protected]" <[email protected]>
SUBJECT: Re: [HCP-Users] BedpostX failed

It happened on subject 100307 and 105115. I am running the job in a
grid engine.
The command line I use is listed below:

bedpostx
/NAS_II/Public-Data/Parcellation/Q2_released_data/105115/105115_Diffusion_preproc/T1w/Diffusion
--nf=2 --fudge=1  --bi=1000 --model=2

Thank you,

Su

2013/10/15 Glasser, Matthew <[email protected]>

What subject is this?

What command line did you call bedpostx with?

Are you running this on your local machine or in some cluster
environment?

Note that a new version of FSL was just released with improvements to
bedpostx that you need to correctly process HCP data (not fixing
missing slices, but correcting for the effects of gradient
nonlinearities on the bmatrix), so I highly recommend you update.

Peace,

Matt.

FROM: Huang Su-Chun <[email protected]>
DATE: Tuesday, October 15, 2013 6:12 PM
TO: Stamatios Sotiropoulos <[email protected]>
CC: "[email protected]" <[email protected]>
SUBJECT: Re: [HCP-Users] BedpostX failed

Hi Stam,

  I checked the bedpostX results and it didn't have the same number of
slices as the input data. It caused problem when I want to to
probabilistic tracking. And this missing slices problem happens quite
a lot!

Thank you,

Su

2013/10/15 Stamatios Sotiropoulos <[email protected]>

Hi

Is it just the message that worries you? Have you checked whether
bedpostx results have the same number of slices as the input data?
Notice that the diffusion data are transferred to T1 space and lots of
inferior/superior slices may be empty.

Cheers
Stam

On 15 Oct 2013, at 04:47, Huang Su-Chun <[email protected]> wrote:


> Hi dear experts,
>
>
> I am running bedpostX on the HCP diffusion data, however, it seems
> that sometimes (60% of chance) the bedpostX ended before finishing
> all the slices. Take the HCP data for example, it should have 145
> slices, but the betpostX stopped at slice 103 then show a message
> said "All slice processed."
>
> Does anyone know where the problem might be? Thank you!
>
>
> Cheers,
>
>
> Su
>
>  --
>
> Su-Chun Huang
> Research Scientist
> Integrated Brain Imaging Center
> Department of Radiology
> University of Washington
> Seattle, WA 98195
>
> phone: 206-687-0113
>
> _______________________________________________
> HCP-Users mailing list
> [email protected]
> http://lists.humanconnectome.org/mailman/listinfo/hcp-users

  --

Su-Chun Huang
Research Scientist
Integrated Brain Imaging Center
Department of Radiology
University of Washington
Seattle, WA 98195

phone: 206-687-0113

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Su-Chun Huang
Research Scientist
Integrated Brain Imaging Center
Department of Radiology
University of Washington
Seattle, WA 98195

phone: 206-687-0113

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the contents of this information is strictly prohibited. If you have
received this email in error, please immediately notify the sender via
telephone or return mail.

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