@MappedSuperclass and relations

Question

In order to minimize work, I generate by Javaclass from the DB. But to allow custom code to be present, I make another class persistent. For example article:
@Entity
@Table(name="article")
public class Article extends nl.reinders.bm.generated.Article
... <custom code here>
@MappedSuperclass
package nl.reinders.bm.generated;
public class Address
... <generated from db code (=properties) here>
When there is a ManyToOne relationship between two classes, I generate both sides using @ManyToOne @JoinColumn(name=...) and @OneToMany(mappedBy...).
The ManyToOne works, but the OneToMany not. If the code is this:
public java.util.Collection<nl.reinders.bm.Sellorderline> iSellorderlinesWhereIAmArticle;
The following error occurs:
The attribute [iSellorderlinesWhereIAmArticle] in entity class [class nl.reinders.bm.Article] has a mappedBy value of [iArticlenr] which does not exist in its owning entity class [class nl.reinders.bm.Sellorderline]. If the owning entity class is a @MappedSuperclass, this is invalid, and your attribute should reference the correct subclass.
nl.reinders.bm.Sellorderline is not a MappedSuperclass, but does not contain the iArticlenr. However referring to nl.reinders.bm.generated.Sellorderline gives the following error:
Exception Description: [class nl.reinders.bm.Article] uses a non-entity [class nl.reinders.bm.generated.Sellorderline] as target entity in the relationship attribute [public java.util.Collection nl.reinders.bm.generated.Article.iSellorderlinesWhereIAmArticle].
What is going on?

Answer 1

Ah, nevermind, it turned out that I stripped the "nr" postfix from the property name. Problem solved.