dparsf预处理时总出现这样的错误，不懂，求教

Submitted by niuwen on Fri, 03/27/2015 - 09:28

 ??? Error using ==> class

Cannot change the number of fields of class 'file_array' without first
typing 'clear classes'.
 
Error in ==> file_array.file_array at 39
a     = class(a,'file_array');
 
Error in ==> nifti.nifti at 70
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Resting-state fMRI topics