Couldn't generate code for the following reason: Encountered unsupported operator partialdiff; In MathML apply element with ID V_x2_diff_calculation. In MathML math element. In CellMLComponent element with name membrane. In Model element with cmeta:id bernus_wilders_zemlin_verschelde_panfilov_2002_version01 with name bernus_wilders_zemlin_verschelde_panfilov_2002_version01.