Issue Resolved.
I required to play around couple of tables i.e. ESLH and ESLL.
- Enter purchasing document in ESLH table and display table entry.
- Ascending field FPACKNO and delete only blank entry from this field (do not consider blank parent entry).
- Get PACKNO from that list.
- With this PACKNO get all PACKNO key field from ESLL table.
- Here 2nd field of tbat table is INTROW that will concatenate after PACKNO.
- that concatenate number is pass into READ_TEXT .
Thank you Ashish Panchal MM For the help.