Not able to deserialize arrays with dynamic response

[lav6]

@copybook(type = FullLastArrayShortMapper.class, charset="UTF-8", strict = true)
@DaTa
public class DivisionData {
@CopyBookLine("10 GGF-DV-FIXED.")
private Division ggfDvFixed;

@CopyBookLine("10 GGF-CS-BN-ITEM OCCURS 50 TIMES.")
private CSBN[] ggfCsBnItem;

}
If I'm using copybook deserializer I'm getting bufferunderexception because my response contains 3 CSBN arrays but it is exceptions 50. Not able to handle Array of java objects