Couldn't generate code for the following reason:
Encountered unsupported operator sum; 
  In MathML apply element with ID J_release_calculation.
  In MathML math element.
  In CellMLComponent element with name subspace.
  In Model element with cmeta:id sobie_dilly_dossantoscruz_lederer_jafri_2002_version01 with name sobie_dilly_dossantoscruz_lederer_jafri_2002_version01.