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Hi SPM,
I'm estimating a 1st level model and get this log with an error in the end.
What should I do?

Thanks
Mx


-----------------------------------------------------------------------
Running job #3
-----------------------------------------------------------------------
Running 'Model estimation'

SPM8: spm_spm (v3151)                              13:21:56 - 13/07/2009
 =======================================================================
Initialising parameters                 :                        ...done

Plane   1/46 , block   1/18             :            ...read & mask data
Plane   1/46 , block   2/18             :            ...read & mask data
Plane   1/46 , block   3/18             :                     estimation
Plane   1/46 , block   4/18             :                     estimation
Plane   1/46 , block   5/18             :                     estimation
Plane   1/46 , block   6/18             :                     estimation
Plane   1/46 , block   7/18             :            ...read & mask data
Plane   1/46 , block   8/18             :            ...read & mask data
Plane   1/46 , block   9/18             :            ...read & mask data
Plane   1/46 , block  10/18             :            ...read & mask data
Plane   1/46 , block  11/18             :            ...read & mask data
Plane   1/46 , block  12/18             :            ...read & mask data
Plane   1/46 , block  13/18             :            ...read & mask data
Plane   1/46 , block  14/18             :            ...read & mask data
Plane   1/46 , block  15/18             :            ...read & mask data
Plane   1/46 , block  16/18             :            ...read & mask data
Plane   1/46 , block  17/18             :            ...read & mask data
Plane   1/46 , block  18/18             :                        ...done
Plane   2/46 , block   1/18             :            ...read & mask data

[.............]

Plane  46/46 , block  18/18             :                        ...done
Temporal non-sphericity (over voxels)   :             ...REML estimation
  ReML Block                  - 1
  ReML Iteration              : 1                            ...4.830212e+01
  ReML Iteration              : 2                            ...9.568543e-01
  ReML Iteration              : 3                            ...2.014118e-02
  ReML Block                  - 2
  ReML Iteration              : 1                            ...1.580206e+01
  ReML Iteration              : 2                            ...2.776070e+00
  ReML Iteration              : 3                            ...4.974526e-01
  ReML Iteration              : 4                            ...8.594087e-02
  ReML Block                  - 3
  ReML Iteration              : 1                            ...1.681558e+01
  ReML Iteration              : 2                            ...2.444305e+00
  ReML Iteration              : 3                            ...3.390639e-01
  ReML Iteration              : 4                            ...4.627282e-02

SPM8: spm_spm (v3151)                              13:35:45 - 13/07/2009
 =======================================================================
Initialising parameters                 :                        ...done
Output images                           :
...initialisingFailed  'Model estimation'
Error using ==> spm_create_vol>create_vol at 52
"unknown" is an unrecognised datatype (NaN).
In file
"/autofs/space/labutokail_001/users/chaumon/matlab/spm8/spm_create_vol.m"
(v1169), function "create_vol" at line 52.
In file
"/autofs/space/labutokail_001/users/chaumon/matlab/spm8/spm_create_vol.m"
(v1169), function "spm_create_vol" at line 16.
In file "/autofs/space/labutokail_001/users/chaumon/matlab/spm8/spm_spm.m"
(v3151), function "spm_spm" at line 552.
In file "/autofs/space/labutokail_001/users/chaumon/matlab/spm8/spm_spm.m"
(v3151), function "spm_spm" at line 902.
In file
"/autofs/space/labutokail_001/users/chaumon/matlab/spm8/config/spm_run_fmri_est.m"
(v2928), function "spm_run_fmri_est" at line 69.

The following modules did not run:
Failed: Model estimation