Dear Ruopeng,

to reproduce the problem with :

MatrixMultiply: m2 is null! and the seg fault.

$source /usr/local/freesurfer/nmr-stable51-env $cd ~gramfort/cluster/work/data/MNE-sample-data/subjects $setenv SUBJECTS_DIR $PWD $freeview -f sample/surf/lh.inflated

if you cannot access this folder you can get it at:

/cluster/fusion/sample_data/MNE-sample-data-processed.tar.gz

Hope this helps,

Alex

On Wed, May 2, 2012 at 3:43 PM, Ruopeng Wang rpwang@nmr.mgh.harvard.edu wrote:

Would it be possible to send us the surface file that caused the crash? So that we can replicate the problem?

Thanks, Ruopeng

On 5/2/12 9:35 AM, Focke, Niels wrote:

...

Dear experts,

I have experienced some problems with freeview. When loading a surface (both for my locally generated surfaces as well as for "bert" surfaces) the program exits (progress bar at approx. 10%) with this message:

MatrixMultiply: m2 is null!

The problem happens both for command line loading and GUI loading. Volume loading/viewing works fine.

Has anyone had a similar problem? Or (even better) has a fix available?

Version information:

FREESURFER_HOME: /tools/freesurfer/live

Build stamp: freesurfer-Linux-centos4_x86_64-stable-pub-v5.1.0

RedHat release: CentOS release 5.7 (Final)

Kernel info: Linux 2.6.18-274.el5 x86_64

Many thanks,

Niels

---

Dr. Niels Focke Klinische Neurophysiologie UMG - Universitätsmedizin Göttingen

---

Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

---

Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.

Thank you Ruopeng.

Is there a "verbose"/debug option in freeview to maybe further localize the problem? Any ideas what else I could do? Display Drivers/OpenGL (Nvidia in my case)?

Cheers,

Niels

__________________________________________________________________________

Dr. Niels Focke Klinische Neurophysiologie UMG - Universitätsmedizin Göttingen

-----Ursprüngliche Nachricht----- Von: Ruopeng Wang [mailto:rpwang@nmr.mgh.harvard.edu] Gesendet: Donnerstag, 3. Mai 2012 14:42 An: Alexandre Gramfort Cc: freesurfer@nmr.mgh.harvard.edu; Focke, Niels Betreff: Re: [Freesurfer] Freeview chrash

Strange. I could not reproduce the error. Niels, I also tried the surface file you sent me. It loads fine. My colleague could not reproduce it on his machine, either.

Alex, since you're in the Martinos center, can you try source the dev version just to see if the same problem exists?

Thanks, Ruopeng

On 5/3/12 4:56 AM, Alexandre Gramfort wrote:

Dear Ruopeng,

to reproduce the problem with :

MatrixMultiply: m2 is null! and the seg fault.

$source /usr/local/freesurfer/nmr-stable51-env $cd ~gramfort/cluster/work/data/MNE-sample-data/subjects $setenv SUBJECTS_DIR $PWD $freeview -f sample/surf/lh.inflated

if you cannot access this folder you can get it at:

/cluster/fusion/sample_data/MNE-sample-data-processed.tar.gz

Hope this helps,

Alex

On Wed, May 2, 2012 at 3:43 PM, Ruopeng Wangrpwang@nmr.mgh.harvard.edu

wrote:

...

Would it be possible to send us the surface file that caused the crash? So that we can replicate the problem?

Thanks, Ruopeng

On 5/2/12 9:35 AM, Focke, Niels wrote:

...

Dear experts,

I have experienced some problems with freeview. When loading a surface (both for my locally generated surfaces as well as for "bert" surfaces) the program exits (progress bar at approx. 10%) with

this message:

...

...

MatrixMultiply: m2 is null!

The problem happens both for command line loading and GUI loading. Volume loading/viewing works fine.

Has anyone had a similar problem? Or (even better) has a fix available?

Version information:

FREESURFER_HOME: /tools/freesurfer/live

Build stamp: freesurfer-Linux-centos4_x86_64-stable-pub-v5.1.0

RedHat release: CentOS release 5.7 (Final)

Kernel info: Linux 2.6.18-274.el5 x86_64

Many thanks,

Niels

---

---

Dr. Niels Focke Klinische Neurophysiologie UMG - Universitätsmedizin Göttingen

---

Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

---

Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the

sender and properly dispose of the e-mail.

...

This is too strange. I logged into the same machine. Both stable and dev version load the surface file without any problem... We will investigate.

Ruopeng

On 05/03/2012 12:12 PM, Alexandre Gramfort wrote:

...

Alex, since you're in the Martinos center, can you try source the dev version just to see if the same problem exists?

I just tried after sourcing /usr/local/freesurfer/nmr-dev-env

and got the same segfault with MatrixMultiply: m2 is null!

I tried on the machine: megmix

Alex