Hi every one

I used SPM5 and FieldMap version2.0 and MATLAB2006. I use the fieldmap of SPM to correct the distortion of EPI scan. The data which I used is the FieldMapExampleData of FieldMap.I did follow the manual.I used the nepi_stretch in FieldMapExampleData as the data.But it gave follow wrong messages:

 

 

>> FieldMap

pm_def =

    INPUT_DATA_FORMAT: 'PM'
      SHORT_ECHO_TIME: 10
       LONG_ECHO_TIME: 14.7600


pm_def =

             INPUT_DATA_FORMAT: 'PM'
               SHORT_ECHO_TIME: 10
                LONG_ECHO_TIME: 14.7600
                     MASKBRAIN: 0
             UNWRAPPING_METHOD: 'Mark3D'
                          FWHM: 10
                           PAD: 0
                            WS: 1
                        MFLAGS: [1x1 struct]
           EPI_BASED_FIELDMAPS: 0
    K_SPACE_TRAVERSAL_BLIP_DIR: 1


pm_def =

             INPUT_DATA_FORMAT: 'PM'
               SHORT_ECHO_TIME: 10
                LONG_ECHO_TIME: 14.7600
                     MASKBRAIN: 0
             UNWRAPPING_METHOD: 'Mark3D'
                          FWHM: 10
                           PAD: 0
                            WS: 1
                        MFLAGS: [1x1 struct]
           EPI_BASED_FIELDMAPS: 0
    K_SPACE_TRAVERSAL_BLIP_DIR: 1
        TOTAL_EPI_READOUT_TIME: 32

??? Error using ==> feval
Undefined function or method 'offset' for input arguments of type 'file_array'.

Error in ==> file_array.subsasgn>asgn at 144
    obj = feval(fun,obj,dat);

Error in ==> file_array.subsasgn at 22
        case 'offset',     obj = asgn(obj,@offset,   subs(2:end),dat); 2204416040ffset(obj,dat);

Error in ==> nifti.subsasgn>assigndat at 361
        val.offset = max(sval.offset,0);

Error in ==> nifti.subsasgn>fun at 76
            obj      = assigndat(obj,val);

Error in ==> nifti.subsasgn at 20
        obji    = fun(obji,subs,val);

Error in ==> spm_create_vol>create_vol at 79
N.dat  = dat;

Error in ==> spm_create_vol at 16
        v = create_vol(V(i));

Error in ==> spm_write_vol at 96
V = spm_create_vol(V);

Error in ==> FieldMap at 1706
      img=spm_write_vol(img,vol);

Error in ==> FieldMap at 1682
         FieldMap('Write',IP.vdmP,IP.vdm.vdm,'',IP.vdmP.dt(1),vdm_info);

Error in ==> FieldMap at 711
            FieldMap('FM2VDM',IP);

??? Error using ==> FieldMap('CreateFieldmap_Gui');
Error using ==> feval
Undefined function or method 'offset' for input arguments of type 'file_array'.

??? Error while evaluating uicontrol Callback

 

How can I solve this problem? Thank you.

 

Sincerely

Wang Qiang