[Eeglablist] bem_matrix.exe failing

Zeynep Akalin Acar zeynep at sccn.ucsd.edu
Sun Jan 31 20:18:36 PST 2010


Hi Paul,

NFT mesh generation module generates meshes with ~19000 nodes. This
requires a memory of about 3 GB. Also, if you apply IPA, the required
memory will be about 4.8GB. The version of bem_matrix.exe included in
the NFT toolbox was compiled with cygwin, and was limited by the
available physical memory. I am working on getting bem_matrix.exe
compile with Visual Studio which should make it use the swap space as
well. It will probably run very slowly on a 2GB machine if it uses
swap, but it should still work.

Best,
Zeynep


On Fri, Jan 29, 2010 at 2:38 AM, Paul Czienskowski <paul_c at gmx.de> wrote:
> Hey all,
>
> For I'm investigating age-related differences in EEG-Source localization for
> my diploma thesis I'm trying to generate the BEM forward-model from T1 MRI
> Data with NFT. Now I'm at the stage to actually create the forward model,
> but bem_matrix.exe crashes with the Exception STATUS_ACCESS_VIOLATION
> (Stackdump see below). I'm running Matlab on a Windows 7 Professional x64
> Laptop (2GB of RAM, 2,3GHz Core2Duo). I was trying to run it on our
> Citrix-Envireonment, but it crashed there too. Maybe anyone encountered the
> problem too and was able to solve it.
>
> Thanks in advance, Paul
>
>
> Stacktrace:
> Exception: STATUS_ACCESS_VIOLATION at eip=610DD894
> eax=00000000 ebx=00040000 ecx=00010000 edx=00000000 esi=611B3F08
> edi=00000000
> ebp=0028C0B8 esp=0028C0AC
> program=C:\Users\Paul\Programmieren\Matlab\NFT-1.0\bin\bem_matrix.exe, pid
> 4040, thread main
> cs=0023 ds=002B es=002B fs=0053 gs=002B ss=002B
> Stack trace:
> Frame     Function  Args
> 0028C0B8  610DD894  (00000000, 611B3F08, 00040000, 5DF00000)
> 00040100  610029C7  (00000032, 000008BC, 000008D0, 00000030)
> 8648586 [main] bem_matrix 4040 _cygtls::handle_exceptions: Exception:
> STATUS_ACCESS_VIOLATION
> 8859954 [main] bem_matrix 4040 _cygtls::handle_exceptions: Error while
> dumping state (probably corrupted stack)
>
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