error when running fALFF preprocessing

I ran preprocessing without filter with no mask, but on the fALFF step I used the BrainMask_05_61x73x61.img after resampling it to one of my Detrended subject images. Read 3D EPI functional images: "/home/kaitlin/data/univariate_masking/FunImgNormalizedSmoothedDetrended/spm_2012Sep28.ps".??? Undefined function or variable "VoxelSize". Error in ==> rest_to4d at 74 VoxelSize = VoxelSize'; Error in ==> f_alff at 34 [AllVolume,vsize,theImgFileList, Header] =rest_to4d(ADataDir); Error in ==> DPARSF_run at 1127 f_alff( [AutoDataProcessParameter.DataProcessDir,filesep,FunImgDir,filesep,AutoDataProcessParameter.SubjectID{i}], ... Error in ==> DPARSF>pushbuttonRun_Callback at 976 [Error]=DPARSF_run(handles.Cfg); Error in ==> gui_mainfcn at 95 feval(varargin{:}); Error in ==> DPARSF at 43 gui_mainfcn(gui_State, varargin{:}); ??? Error using ==> DPARSF('pushbuttonRun_Callback',gcbo,[],guidata(gcbo)) Undefined function or variable "VoxelSize". ??? Error while evaluating uicontrol Callback Thank you, Justin