AlphaSim problems

I am trying to make an alpha-sim from a mfALFF contrast map created by using SPM (but no REST toolbox), and always appear the same error when I try to calculate the smooth:

?? Undefined function or variable "testFlag".

Error in ==> rest_Smoothest_gui>Comput_pushbutton_Callback at 207
if strcmp(testFlag,'Z')

Error in ==> gui_mainfcn at 96

Error in ==> rest_Smoothest_gui at 42
    gui_mainfcn(gui_State, varargin{:});

Error in ==>

??? Error using ==> waitfor
Error while evaluating uicontrol Callback

However, if I make an AlphaSim from a contrast MAP obtained by using SPM, this error doesn't appears...

Does anyone know what could be happening? Thank you very much.


 I think what you mentioned contrast MAP obtained by SPM is actually statistics MAP (i.e., either spm_T or spm_F). 
For those statistical maps est smoothness will work.

However, for your mfALFF contrast map, you said you created by using SPM, I don't know how you made this. If it is a statistical map just like spm_T/F, I think it will work, but in your case, rest_Smoothest_gui can not read that information (i.e., T, F, R, or Z) from your input image. So the error came out.

I don't know how to estimate the smoothness, but after reading script, I found the reason is above. 

You are true, thank you very much. I was trying to calculate the smooth in a non-contrast map (in fact it was a con_image)
Thank you very much for your time.


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