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