Couldn't generate code for the following reason:
Encountered unsupported operator partialdiff; 
  In MathML apply element with ID c_partialdiff_eq.
  In MathML math element.
  In CellMLComponent element with name calcium.
  In Model element with cmeta:id sneyd_tsaneva-atanasova_bruce_straub_giovannucci_yule_2003_version01 with name sneyd_tsaneva-atanasova_bruce_straub_giovannucci_yule_2003_version01.