the error message about functional connetivity

Dear Dr.Yan,

 After I using xjview to save a ROI as a mask in two-sample t-test, I tried to use this mask to do voxel wise functional connectivity with Rest, unfortunately it showed error message.

The error Dialog is

Exception occured: Error using sprintf. Function is not defined for "cell" inputs.

The worng message is showed below

         Computing functional connectivity with:"/data_RAID/DPARSFA/input_test"

          Read 3D EPI functional images: "/data_RAID/DPARSFA/input_test"......................................

          Load mask "/data_RAID/DPARSFA//input_test/my_mask.img".

          Build functional connectivity mask.       Wait...

====================#####/data_RAID/Jing/DPARSFA/input_test: ROI001#####====================

          ROI time course retrieving through "/".

Exception occured.  (MATLAB:printf:invalidInputType)

         Error using sprintf

Function is not defined for 'cell' inputs.

         229#line,           fc,     in "/shome/software/spm8/toolbox/REST_V1.8/fc.m"

         1419#line,                  (parfor body),  in "/shome/software/spm8/toolbox/REST_V1.8/fc_gui.m"

         470#line,           parallel_function,    in "/shome/local/sw/matlabR2012a/toolbox/matlab/lang/parallel_function.m"

         1370#line,                  btnComputeFC_Callback,        in "/shome/software/spm8/toolbox/REST_V1.8/fc_gui.m"

         96#line,             gui_mainfcn,    in "/shome/local/sw/matlabR2012a/toolbox/matlab/guide/gui_mainfcn.m"

         39#line,             fc_gui,      in "/shome/shang/software/spm8/toolbox/REST_V1.8/fc_gui.m"

The process of my doing FC is like this:

1.Data directory included the alff data, which is nii format.

2. voxel wise using user-defined mask, and and used defined mask file

Any suggestion will be highly appreciated!

Best

Fish