Thanks @Nicolas Micoud, can you please upgrade the patch to development branch - and avoid the creation of additional fields - with the new Create Fields you can choose the date from.
As the field is read-only and assigned via a process, maybe it can be just shown if there is a value on it (haven't reviewed if is configured like that)
Regards,
Carlos Ruiz
Nicolas Micoud October 30, 2012 at 2:25 PM
Edited
Hi Carlos, Please review.
Note that some missing fields were created through TabCreateFields process
http://red1.org/adempiere/viewtopic.php?f=31&t=1708