DPARSFA error when stopping and restarting pipeline

DPARSFA has no problem processing a NIFTI dataset through the steps of Slice Timing and Realign. However, I get a reproducible error if I try to separate the steps in the pipeline. For example:

1) Processing the NIFTI dataset through Slice Timing alone works fine.
2) But if I try to restart DPARSFA at Realign, using FunNiiGZA as my starting point, I get the following error:

--------------------------------------------------------------------------
Error using parallel_function (line 589)

Can NOT retrieve the TR information from the NIfTI images

Error stack:
DPARSFA_run>(parfor body) at 277

Error in DPARSFA_run (line 264)
            parfor i=1:AutoDataProcessParameter.SubjectNum

Error in DPARSFA>pushbuttonRun_Callback (line 1469)
    [Error]=DPARSFA_run(handles.Cfg);

Error in gui_mainfcn (line 96)
        feval(varargin{:});

Error in DPARSFA (line 33)
    gui_mainfcn(gui_State, varargin{:});
 
Error while evaluating uicontrol Callback

---------------------------------------------------------------------------

And I get the exact same error if I try to restart the pipeline at Voxel-Specific Head Motion, using FunNiiGZAR as my starting point. Just wondering if anyone has thoughts on how to fix this? I'm running DPARSFA V2.2PRE_120905 on Matlab R2012a and OSX 10.8.2.

Thanks,

Jason Druzgal