ProcessingException[ProcessingStatus[ERROR code=0 invoking MPXRid.shared.services.process.IClientProcessService:load / SQL with binds:
SELECT    PINUMBER,
          INITIALS,
          FIRSTNAME,
          LASTNAME,
          INFIX,
          TITLE
FROM      CLIENT
WHERE     ID = :clientNr
INTO      :piNummer,
          :initialen,
          :voornaam,
          :achternaam,
          :tussenvoegsel,
          :aanroep
IN  :clientNr => ? [BIGINT 15903] / Cannot find output for 'ValueOutputToken[piNummer parsed ':piNummer', replaced ':piNummer' into]' in bind base. When selecting into shared context variables make sure these variables are initialized using CONTEXT.set<i>PropertyName</i>(null)]]
	at org.eclipse.scout.rt.server.services.common.jdbc.internal.exec.StatementProcessor.createOutput(StatementProcessor.java:934)
	at org.eclipse.scout.rt.server.services.common.jdbc.internal.exec.StatementProcessor.<init>(StatementProcessor.java:152)
	at org.eclipse.scout.rt.server.services.common.jdbc.AbstractSqlService.createStatementProcessor(AbstractSqlService.java:785)

public class ClientFormData extends AbstractFormData {
  private static final long serialVersionUID = 1L;

  public ClientFormData() {
  }

  public ClientNrProperty getClientNrProperty() {
    return getPropertyByClass(ClientNrProperty.class);
  }

  /**
   * access method for property ClientNr.
   */
  public Long getClientNr() {
    return getClientNrProperty().getValue();
  }

  /**
   * access method for property ClientNr.
   */
  public void setClientNr(Long clientNr) {
    getClientNrProperty().setValue(clientNr);
  }

  public PersoonlijkBox getPersoonlijkBox() {
    return getFieldByClass(PersoonlijkBox.class);
  }

  public class ClientNrProperty extends AbstractPropertyData<Long> {
    private static final long serialVersionUID = 1L;

    public ClientNrProperty() {
    }
  }

  public class PersoonlijkBox extends AbstractPersoonlijkBoxData {
    private static final long serialVersionUID = 1L;

    public PersoonlijkBox() {
    }
  }
}

@FormData(value = AbstractPersoonlijkBoxData.class, sdkCommand = FormData.SdkCommand.CREATE, defaultSubtypeSdkCommand = FormData.DefaultSubtypeSdkCommand.CREATE)
public abstract class AbstractPersoonlijkBox extends AbstractGroupBox {

  @Override
  protected String getConfiguredLabel() {
    return Texts.get("Persoonlijk");
  }

  public AanroepField getAanroepField() {
    return getFieldByClass(AanroepField.class);
  }

  public AchternaamField getAchternaamField() {
    return getFieldByClass(AchternaamField.class);
  }

  public PiNummerField getPiNummerField() {
    return getFieldByClass(PiNummerField.class);
  }

  public TussenvoegselField getTussenvoegselField() {
    return getFieldByClass(TussenvoegselField.class);
  }

  public VoorlettersField getVoorlettersField() {
    return getFieldByClass(VoorlettersField.class);
  }

  public VoornaamField getVoornaamField() {
    return getFieldByClass(VoornaamField.class);
  }

  @Order(10.0)
  public class PiNummerField extends AbstractStringField {

    @Override
    protected String getConfiguredLabel() {
      return Texts.get("PiNummer");
    }
  }

  @Order(20.0)
  public class AanroepField extends AbstractListBox<Long> {

    @Override
    protected String getConfiguredLabel() {
      return Texts.get("Aanroep");
    }
  }

  @Order(30.0)
  public class VoornaamField extends AbstractStringField {

    @Override
    protected String getConfiguredLabel() {
      return Texts.get("Voornaam");
    }
  }

  @Order(40.0)
  public class VoorlettersField extends AbstractStringField {

    @Override
    protected String getConfiguredLabel() {
      return Texts.get("Voorletters");
    }
  }

  @Order(50.0)
  public class TussenvoegselField extends AbstractStringField {

    @Override
    protected String getConfiguredLabel() {
      return Texts.get("Tussenvoegsel");
    }
  }

  @Order(60.0)
  public class AchternaamField extends AbstractStringField {

    @Override
    protected String getConfiguredLabel() {
      return Texts.get("Achternaam");
    }
  }
}

SQL.selectInto(
  "SELECT    PINUMBER,"+
  "          INITIALS,"+
  "          FIRSTNAME,"+
  "          LASTNAME,"+
  "          INFIX,"+
  "          TITLE"+
  " FROM     CLIENT"+
  " WHERE    ID = :clientNr"+
  " INTO     :persoonlijkBox.piNummer,"+
  "          :persoonlijkBox.voorletters,"+
  "          :persoonlijkBox.voornaam,"+
  "          :persoonlijkBox.achternaam,"+
  "          :persoonlijkBox.tussenvoegsel,"+
  "          :persoonlijkBox.aanroep",
  formData  <--- THIS IS THE BIND BASE
);

SQL.selectInto(
  "SELECT    PINUMBER,"+
  "          INITIALS,"+
  "          FIRSTNAME,"+
  "          LASTNAME,"+
  "          INFIX,"+
  "          TITLE"+
  " FROM     CLIENT"+
  " WHERE    ID = :clientNr"+
  " INTO     :piNummer,"+
  "          :voorletters,"+
  "          :voornaam,"+
  "          :achternaam,"+
  "          :tussenvoegsel,"+
  "          :aanroep",
  formData.getPersoonlijkBox() <--- THIS IS THE BIND BASE
);

public void storePersoonlijkBoxData(AbstractPersoonlijkBoxData boxData) {
  //handle
}