defining input in the state chart same as simulink

I am having an error in defining an additional input in the chart. I am using a simulink and chart for a model design. I am trying "inherit: same as in simulink mode" same as i used with other inputs. However, adding one more input is giving error: MATLAB chart 'SOC_ CC_ OCV _ Switching model /Chart' requires port 'HESS_OCVtoCC_7_may_17/SOC_ CC_ OCV _ Switching model /Chart/SOC_CC1/h' to explicitly specify (not inherit) the values of the following properties: Size Type Complexity Variable size. Component: Stateflow | Category: General error An error occurred while synchronizing 'SOC_ CC_ OCV _ Switching model /Chart' and its atomic subcharts or functions. Component: Stateflow | Category: General error An error occurred while synchronizing 'SOC_ CC_ OCV _ Switching model /Chart' and its atomic subcharts or functions.