// load ouput fields
int nrFields = rep.countNrStepAttributes(id_step, "output_field_name");
outputFields.clear();
for(int i=0;i<nrFields;i++){
OutputFieldMeta outField = new OutputFieldMeta(
rep.getStepAttributeString(id_step, i, "output_field_name"),
(int) rep.getStepAttributeInteger(id_step, i, "output_field_type"),
rep.getStepAttributeBoolean(id_step, i, "output_field_update")
);
outputFields.add(outField);