out of meory

我用的是windows 2003 server， 4G内存
在Detrend 出错，出错时任务管理器显示内存只使用了650M
DPARSF Release=V2.1_120101
rest 1.8 PRE
出错信息如下，多谢指教！

Removing the linear trend: D:
     Read 3D EPI functional images: "D:\Pain\Process\FunImgNormalized\20121121002".Out of memory. Type HELP MEMORY for your options.

Error in repmat (line 104)
    B = A(subs{:});

Error in rest_to4d (line 87)
                AllVolume =repmat(AllVolume, [1,1,1, nVolumn]);

Error in rest_detrend (line 28)
    [AllVolume,VoxelSize,theImgFileList, Header] =rest_to4d(ADataDir);

Error in DPARSF_run (line 992)
        rest_detrend([AutoDataProcessParameter.DataProcessDir,filesep,FunImgDir,filesep,AutoDataProcessParameter.SubjectID{i}],
        '_detrend');

Error in DPARSF>pushbuttonRun_Callback (line 976)
    [Error]=DPARSF_run(handles.Cfg);

Error in gui_mainfcn (line 96)
        feval(varargin{:});

Error in DPARSF (line 43)
    gui_mainfcn(gui_State, varargin{:});
 
Error while evaluating uicontrol Callback