Hi all,
In the last month i was searching for a solution to integrate a long text in the long description text for my operations at the task list level, and i was really surprised by the amount of open topics with no clear answer. So, I found with the help of one of my colleagues how to do it:
This document is a complete view on the LSMW 0470 Object with 0000 Method.
In this document you will find the structure of the mapping & the LSMW trick & tips :
Object Attribute :
Maintain Source Field :
The Source Fields definition : it's a 5 file LSMW
Please note the the Field (BOM_USAGE == Task list Group counter)
Please note that the structure in the system is defined on 72 CAR for the Long text (STR_TEXT-TEXT) description but you must set itat 40.
If you want to get some errors change it 
Maintain Structure Relationship :
Maintain Field Mapping :
The Tcode must be changed to IA01 for Equipment Task list or IA05 for Instruction Task list ot IA11 for FL task list :
Task list Header :
Operations list :
The First Tip is in the long text mapping :
Please note again : Even if the IBIPTEXT-TXLINE is a 72 CAR you must map it with a 40 CAR field.
For a long description containing 200 CAR for the Operation with "OP_IDENTIFICATION = OP0000023"
The file will be like this :
Exemple for a CSV file :
OP0000023; SAP ERP was built comprising the former
OP0000023; SAP R/3. SAP R/3 through version 4.6c co
OP0000023; nsisted of various applications on top o
OP0000023; f SAP Basis, SAP's set of middleware
The result is this :
Task list component :
Maintenance Packages :
Specify Files :
Create Batch Input session :
And the last trip is the processing mode : ==> Call Transaction. 
If you found this post interesting or useful, please consider rating it
If you have any questions regarding the Maintenance LSMW Objects. I will be available to answer it ASAP.
Kind Regards,
Karim Es.