SAP Note 19872 - Batch input and subscreens

Symptom:

When a batch input session is processed in which subscreens have to be processed, the processing routine runs into an error, e.g.
"Batch input data not available for screen " or
"Field does not exist in screen ".
Assumption: the main screen is missing during processing.
How do you access the main screen?

Cause and prerequisites

Within an application, some screens may have SUBscreens. Providing these screens with batch input data requires some detailed knowledge.

Solution
Procedure:
1. Analyze the involved screen at runtime by placing the cursor
on the various screen fields and calling F1/Technical info. If
the name of the screen in the technical info changes, this means
you are dealing with a main screen with subscreens.

2. Now call the Screen Painter (transaction SE51) and find out which
screen is the main screen.

3. Enter the main screen as the start screen in the BDC table
(BDCDATA). All fields (main screen and subscreens) are entered
underneath. The batch input runtime system will then
automatically look for the fields, first in the main screen
and then in the subscreens.