ALFF error message (copyfile)

Hi,

I'm new to using the REST toolkit and I'm having some trouble launching ALFF. Basically I input my directory that contains my img/hdr files and select the default parameters for band pass filtering and then select an output directory. When I press do all, this is the error I receive:

Build ALFF filtered mask. Wait...
ALFF computing. Wait...
Exception occured. (MATLAB:UndefinedFunction)
Undefined function or variable "idxHighPass_LowCutoff".
179#line, alff, in "/mnt/musk2/home/heydee/REST_V1.4_100426/alff.m"
318#line, btnComputeAlff_Callback, in "/mnt/musk2/home/heydee/REST_V1.4_100426/alff_gui.m"
96#line, gui_mainfcn, in "/mnt/musk2/local/matlab2010b/toolbox/matlab/guide/gui_mainfcn.m"
33#line, alff_gui, in "/mnt/musk2/home/heydee/REST_V1.4_100426/alff_gui.m

I looked in the alff.m script and it looked like idxHighPass._LowCutoff was defined, so I'm not sure what's going on.