Im trying to get some data with NH CreateSQLQuery method like

IList<Logistic> LCollection = sess.CreateSQLQuery(@"select * from some_schema.logistic")
                                           .SetResultTransformer(Transformers.AliasToBean(typeof(Logistic)))
                                           .List<Logistic>();

logistic class is

public class Logistic
{
    public virtual long? l_id { get; set; }
    public virtual long? carrier_id { get; set; }
    ...
}

mapping

public class LogisticMap : ClassMap<Logistic>
{
    public LogisticMap()
    {
        Table("some_chema.logistic");
        Id(x => x.l_id).GeneratedBy.Sequence("some_chema.logistic_sq");
        Map(x => x.carrier_id);
        ...
    }
}

but i have the error 

The type System.Decimal can not be assigned to a property of type System.Nullable`1[System.Int64] setter of MyNamespase.Logistic.l_id

any idea what may be wrong?

c# nhibernate
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