[Eeglablist] Out of Memory Error on EDF Import (25 channels, 400 Hz)

[Jared Saletin]

Thanks so much for all the help everyone! We switched over to 64 bit  
linux and 64 bit Matlab and it solved the issue, and now works like a  
charm!

Best,

Jared

On Sep 8, 2009, at 12:18 PM, Grega Repovs wrote:

> Jared,
>
> To be able to open and work on large files in Matlab, you not only  
> need enough RAM but also be able to address the available memory.  
> The out of memory messages you are seing are not due to actual lack  
> of physical RAM space but the amount of RAM you would need to  
> address is larger than a 32 bit addressing system can handle. To be  
> able to open and use such large files in Matlab, you need to run 64  
> bit version of Matlab. On Linux and Windows it means that you also  
> need to run 64bit version of the operating system. On Mac OS X you  
> can run 64 bit application in parallel with 32 bit ones. I have been  
> using 64 bit Matlab and EEGLab on Mac OS X 10.5 and 10.6 without  
> issues. With enough RAM I was able to have several 2+ GB recordings  
> open in parallel. Recently I have also recompiled binica to run in  
> 64 bit mode on Mac OS X - you can find and download it on EEGLab wiki.
>
> Best,
>
> Grega
>
>
> On 8 Sep 2009, at 11:03 , Guillaume Rousselet wrote:
>
>> Jared,
>>
>> 4GB of RAM should be enough. The problem is whether Matlab or your  
>> operating system can actually use them. In my experience the only  
>> way to make full use of your RAM is to run Matlab under Linux.  
>> Windows XP, Vista, or mac OS X will fail.
>>
>> Hope this help,
>>
>> Best,
>>
>> GAR
>>
>> On 6 Sep 2009, at 02:45, Jared Saletin wrote:
>>
>>> Hi there,
>>>
>>> My name is Jared Saletin. I'm a grad student at UC Berkeley, still
>>> learning EEGLab. I was wondering if someone may be able to help me
>>> with a memory problem. We are trying to read in EDFs of sleep EEG
>>> including 25 channels sampled at 400 Hz, recorded for about 120
>>> minutes. The EDFs are about 200 mb in size.
>>>
>>> We are  receiving out of memory errors despite having 4 gb of RAM in
>>> the systems.
>>>
>>> Should this not be enough memory for such a dataset? I'm more
>>> concerned because some of our sleep recordings are 4 times that  
>>> length.
>>>
>>> I'd appreciate any thoughts you all may have. Thanks so much!
>>>
>>> Cheers,
>>> Jared
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>>
>>
>>
>>
>> ************************************************************************************
>> Guillaume A. Rousselet, Ph.D.
>>
>> Lecturer
>>
>> Centre for Cognitive Neuroimaging (CCNi)
>> Department of Psychology
>> Faculty of Information & Mathematical Sciences (FIMS)
>> University of Glasgow
>> 58 Hillhead Street
>> Glasgow, UK
>> G12 8QB
>>
>> The University of Glasgow, charity number SC004401
>>
>> http://web.me.com/rousseg/GARs_website/
>>
>> Email: g.rousselet at psy.gla.ac.uk
>> Fax. +44 (0)141 330 4606
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>>
>>
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>>
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>>
>>
>>
>>
>>
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