fix raw streamline output, without outputroot

Author: Joerg Stadler

nipype/interfaces/camino/convert.py

@@ -463,7 +463,8 @@ def _get_actual_outputroot(self, outputroot):
     def _list_outputs(self):
         outputs = self.output_spec().get()
         outputs['proc'] = os.path.abspath(self._gen_outfilename())
-        outputs['outputroot_files'] = self.outputroot_files
+        if isdefined(self.inputs.outputroot):
+            outputs['outputroot_files'] = self.outputroot_files
         return outputs
 
     def _gen_outfilename(self):