To compute a MAP value, the SP must be greater than or equal to the DP. To compute a PP value, the SP must be greater than or equal to the PADP. To compute a MPAP value, the PASP must be greater than or equal to the PADP. To compute a CPP value, the DP must be greater than or equal to the PCWP. Otherwise, MediCalc™ won't compute results or will return an "incorrect calculation" message.