Automapper inheritance -- reusing maps

Question

I am trying to use automapper to create a single map for a parent object and to reuse this amongst its children.

For child properties I only want to map the extra fields.

Is this possible? The code I have looks like this

CreateCalculationMap(message);  ---- This does the BASE parent mappping.
    Mapper.CreateMap<QuoteMessage, CalculationGipMessage>()                     -- This is the child.
        .Include<QuoteMessage, CalculationBase>()                               -- Include the parent?
        .ForMember(a => a.OngoingCommission, b => b.MapFrom(c => c.OngoingASF)) - Child
        .ForMember(a => a.SpecialRate, b => b.MapFrom(c => c.BlahBlah)));       - Child

Why does it keep telling me the parents properties are not mapped? Yet, I thought I included them in CreateCalculationMap(message); which contains

Mapper.CreateMap<QuoteMessage, CalculationBase>() ()

Answer 1

FYI I figured this out

 public static IMappingExpression<A, T> ApplyBaseQuoteMapping<A, T>(this   IMappingExpression<A, T> iMappingExpression)
        where A : QuoteMessage
        where T : CalculationGipMessage
    {
        iMappingExpression
            .ForMember(a => a.LoginUserName, b=> b.MapFrom(c => c.LoginUserName))
            .ForMember(a => a.AssetTestExempt, b => b.Ignore())
            ;

        return iMappingExpression;
    }


Mapper.CreateMap<QuoteMessage, CalculationGipMessageChild>()
            .ApplyBaseQuoteMappingToOldCol()
             // do other mappings here