Hi,
What field you added to data source?
What is base table of you added field?
Is this field which you added - SOBST?
Other than this field, have you added any enhancement code?
if use break point then asusally exection will stop at your code as irrespective of field known(think so)
Where your doing this activity? ecc dev or ecc sandbox ?
Just uncheck field only know in exist for added field and run data source.
Check the field value, is it filled as per the logic or not.
Thanks