BPL - Define Selection Criteria (Selection Exit)

We are using TDMS 3.0 with following patch level:

DMIS             2006_1_700     0010

DMIS_CNT     2006_1_700     0010

DMIS_EXT     2007_1_700     0000

We have a scenario where we want to transfer all sales transactions of particular plant in target system. We have selected package BPL scenario in TDMS with business context sales document.

Under 'Define selection criteria' activity, we are getting only sales Document number as a filter criteria. We can extend the filter criteria to any column of table VBAK, but not any of the dependent tables (Like VBAP - containing plant)

The operation guide shows an example of selection criteria for materials, filtering by the start table (MARA-MATNR) and at the same time by a dependent table (MARC-WERKS).  I want to apply the same logic to tables VBAK & VBAP. There are two problems in my way:

1. As per operation guide, when you execute 'Define Selection Criteria', we should see three tab pages. 'Selections', 'Selection criteria' & 'Tables'. But I can see only two in my system i.e 'Selection criteria' & 'Tables'. There is no 'Selection' tab page in my system.

2. Referring to forum Re: BPL: Filtering depending tables , we can use 'Selection Exit'. But can anybody guide me how that can be implemented and attached to the filter / process?

Thanks & Regards,

Audy.