warp fields are not created without this change and the workflow fails

silently

Author: chrisgorgo

nipype/workflows/fmri/fsl/preprocess.py

@@ -1172,6 +1172,7 @@ def create_reg_workflow(name='registration'):
     register.connect(anat2target_affine, 'out_matrix_file',
                      anat2target_nonlinear, 'affine_file')
     anat2target_nonlinear.inputs.warp_resolution = (8, 8, 8)
+    anat2target_nonlinear.inputs.fieldcoeff_file = True
     register.connect(inputnode, 'anatomical_image', anat2target_nonlinear, 'in_file')
     register.connect(inputnode, 'target_image',
                      anat2target_nonlinear, 'ref_file')