Error creating entity Topic : DDS_Topic_createI:!type registered

Hi All,

I have create my own DataModel through IDL struct definition:
--->FooCustomData.idl:

struct FooCustomData{
  string<128>  aStringVar;
  long aLongVar;
  float aFloatVar;
  boolean aBooleanVar;
};

So i have  launch the command "rtiddsgen -language Java -package myexample.customfoo FooCustomData.idl -ppDisable" for code Java generation, and the generator create files:

FooCustomData, FooCustomDataTypeSupport, FooCustomDataTypeCode, FooCustomDataSeq, FooCustomDataDataWriter and  FooCustomDataDataReader.

So in my subscriver java class i have add the following code:

   DomainParticipant participant = DomainParticipantFactory.get_instance().create_participant(
                    0,
                    DomainParticipantFactory.PARTICIPANT_QOS_DEFAULT,
                    null, // listener
                    StatusKind.STATUS_MASK_NONE);
            if (participant == null) {
                System.err.println("Unable to create domain participant");
                return;
            }
           
        
            Topic topic = participant.create_topic(
                    "Test Data",
                    FooCustomDataTypeSupport.get_type_name(),
                    DomainParticipant.TOPIC_QOS_DEFAULT,
                    null, // listener
                    StatusKind.STATUS_MASK_NONE);
      

WHen I launch the java application I obtaion the following error:

DDS_Topic_createI:!type registered
Exception in thread "main" com.rti.dds.infrastructure.RETCODE_ERROR: error creating entity
    at com.rti.dds.util.Utilities.rethrow(Utilities.java:92)
    at com.rti.dds.infrastructure.NativeFactoryMixin.create_entityI(NativeFactoryMixin.java:188)
    at com.rti.dds.domain.DomainParticipantImpl.create_topic(DomainParticipantImpl.java:1099)
    at com.ndds.testsubscriver.utility.TestMySubscriver.main(TestMySubscriver.java:41)

I think that the problem is probably the definition of FooCustomDataTypeSupport, cause when i have try to substitute it with StringTypeSupport.get_type_name() i have no problem, and the content is DDS:String.

How i can resolve my problem? How i can Debug rti connext the code to understand if my tipe generate is done ok from rtiddsgen ?

Thank you, in advance.

Manuel