??? Error using ==> read_hdr at 55

Unrecognised datatype (4096) for "C:\Users\BUKHARI\Desktop\Batch Processing

fMRI\Joanes Data\ascCAP058\raw\058CAP2.img.

Error in ==> nifti.nifti at 27

        vol    = read_hdr(fname);

Error in ==> spm_vol_nifti at 16

N  = nifti(fname);

Error in ==> spm_vol>subfunc at 124

V = spm_vol_nifti(p,n);

Error in ==> spm_vol>subfunc1 at 77

    v = subfunc(P(i,:));

Error in ==> spm_vol>subfunc2 at 69

    V = subfunc1(P);

Error in ==> spm_vol at 54

V = subfunc2(P);

If I change this 4D in to 3D series using MRIcro software; then spm_vol function works perfectly fine. So should I assume that this function is not able to read 4D files ?? I already read that a lot of times it has been discussed that spm now can handle 4D images; but somehow in practice there are still a lot of errors that spm generates while reading 4D files; I dont know the reasons though.

Can somebody help in that ?

Thanks a lot