Fixed issue with CSD estimation in MRtrix3

Author: matteomancini

nipype/interfaces/mrtrix3/reconst.py

@@ -102,10 +102,10 @@ class EstimateFODInputSpec(MRTrix3BaseInputSpec):
         mandatory=True,
         desc='output WM ODF')
     gm_txt = File(argstr='%s', position=-4, desc='GM response text file')
-    gm_odf = File('gm.mif', usedefault=True, argstr='%s',
+    gm_odf = File('gm.mif', usedefault=False, argstr='%s',
                   position=-3, desc='output GM ODF')
     csf_txt = File(argstr='%s', position=-2, desc='CSF response text file')
-    csf_odf = File('csf.mif', usedefault=True, argstr='%s',
+    csf_odf = File('csf.mif', usedefault=False, argstr='%s',
                    position=-1, desc='output CSF ODF')
     mask_file = File(exists=True, argstr='-mask %s', desc='mask image')