Mapping is not working for the child object

[himilmodi]

public class a{
public int Id {get;set;}
public b ObjB{get;set;}
}

public class b{
public string Name {get;set;}
}

When i just tried to map with class A property
.Map(o => o.ObjB.Name, "Name")

then it is throwing below error
Expression 'o => o.ObjB.Name' must resolve to top-level member and not any child object's properties. You can use ForPath, a custom resolver on the child type or the AfterMap option instead. (Parameter 'lambdaExpression')'

Can you guys help me resolved this issue ?

[v-kabanov]

Pardon, I have not seen this issue until now. Populating nested objects is not supported in the existing reader implementation because TableMappingReader uses ForMember and not ForPath. To work around one can create a dedicated flat POCO class to receive data from the source and maybe have it instantiate a structured complex object upon request, or use the AutoMapper for the conversion.