tJavaFlex and Data Auto Propagate

[VictorFaure]

Hello, I have some data I need to unpivot and I'm using tJavaFlex to do so, I have the following code:

Start:

for (java.lang.reflect.Field f : row1.getClass().getDeclaredFields()) {

Main:

if (f.getType() == String.class) {
	row2.MATRICULE = row1.MATRICULE;
	row2.fieldName = f.getName();
	row2.fieldValue = f.get(row1).toString();
}

End:

}

The problem is some technical byteArray field gets transferred even though I unchecked Data Auto Propagate...

I then have several questions, firstly, how to fix my problem (technical rows that get through) ? And what does Data Auto Propagate even do ?