Generic delta in datasource

Hi all;

I recently created a datasource in ECC using a generic deltat on a date field in a table. My question is when executing the extractor the field I choosed for the deltat is not been filled. More clearely in the PSA I do not retrieve data for that field. Is there any option that I can set to be able to retireve the field or does the deltat extraction work as that.

Regards

Anis