Yes, you can use TEACTION PutField for an update--the way
that Screensurfer interacts with the TN3270 screen is
identical, whether the application behind the screen is
performing an update or add.
What might be different, however, is that frequently some
fields that are set-up as input fields for an ADD are not
available (they are protected) when performing an update.
So, maybe one or two of your fields is not available by the
application for update and that is causing a problem in