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Dear spm experts,
normalization failed using 3D nifti in SPM5 and matlab spits out warning
message as below.
Can anyone tell me what this message means and how to fix it?

Thanks in adavance,

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

iteration 11: Warning: Matrix is singular, close to singular or badly
scaled.
         Results may be inaccurate. RCOND = NaN.
> In spm_normalise>snbasis at 303
  In spm_normalise at 194
  In spm_config_norm>estwrite at 491
  In spm_jobman>run_struct1 at 1587
  In spm_jobman>run_struct1 at 1597
  In spm_jobman>run_struct1 at 1597
  In spm_jobman>run_struct1 at 1597
  In spm_jobman>run_struct at 1516