Hello,
If you have access to the BatchLoader, then this kind of mass edit should be possible using it. The BatchLoader accepts two kinds of information to run: a template file and a data file. The template file outlines the AML that will be run for each row of data in the data file. To use the BatchLoader to run a mass update, you would just need to format your template to perform an update on an existing item instead of creating a new one like the example template below.
<AML>
<Item type="Part" action="edit" where="keyed_name = '{0}'">
<new_property>{1}</new_property>
</Item>
</AML>
This AML expects two things in the data file. The first will be the keyed_name of the existing Part in the database, so it knows which part to edit. The second will be the value for the new property you have added to the ItemType.
Chris
Christopher Gillis
Aras Labs Software Engineer