Spring Roo/DBRE + Some sort of error accessing a property

Here is part of my stack trace:

com.package.af.domain.DepreciationDetails.processA ccountingEntry_aroundBody6(DepreciationDetail.java :173)
com.package.af.domain.DepreciationDetails.processA ccountingEntry(DepreciationDetail.java:1)
com.package.af.web.FixedAssetController.processAcc ountingEntry(FixedAssetController.java:230)
sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)

This is what I've done:

1- Succesfully did a DBRE process on 4 tables
2- For two of them Roo, found a primary key, the other two got a [Class]PK, composite key Class. This step its ok according with JPA specification.
3- I can persist data on the tables that doesn't have the PK (composite primary key workaround)
4- I've made a Push-In Refactor in those entities with the 'identifierType=[Class]PK.class', to modify them, that was ok.

I cant set values to those properties, eventhough there's nothing wrong with them, if I see in the code at line 173 I see:

DepreciationDetail.java:173

Code:

---

LegacyTableClass Header = new LegacyTableClass();
Header.getId().setAnyStringField("any string value");  <---- This part here gives the error.

---

As you can see, I think I am doing the things right, when I do

Header.getId(), I am actually calling an instance of LegacyTableClassPK, with contains the properties, getters and setters, but it doesn't work.

I don't know what to do, any clues?

Fortunely I've found it, I was wrong when I tried to set the properties of the composite PK Class. The correct way is:

Code:

---

LegacyTableClass instanceOfLegacyTableClass = new LegacyTableClass();
LegacyTableClassPK legacyTableClassPk = new LegacyTableClassPK(fieldValue1, fieldValue2, fieldValue3);
instanceOfLegacyTableClass.setId(legacyTableClassPk);
instanceOfLegacyTableClass.persist();

---

And that's all.