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SAP LSMW Explained with example
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LSMW is a tool used to tranfer data from legacy system to R/3 periodically or once.It supports conversion of data and Batch Input,BAPI,IDOC or Direct Input can be used as the method for transfer of data.Total of 26 processing steps are available in LSMW ,In case of data transfer using Batch Input only 14 steps are required.

Execute the transaction LSMW to start transfer of data,Before using the LSMW we should have good knowledge about the business object and the fields that will be transferred.

There are 14 steps that are normally used and these are :
1)   Maintain Object Attributes.
2)   Maintain Source Structures.
3)   Maintain Source Fields.
4)   Maintain Structure Relations
5)   Maintain Field Mapping and conversion rules .
6)   Maintain Fixed Values,translations ,user defined routines.
7)   Specify Files .
8)   Assign Files .
9)   Read DATA.
10) Display Read Data.
11) Convert Data.
12) Display Converted Data.
13) Create Batch Input Session.
14) Run Batch Input Sesion.

Opening Screen of LSMW
Click on Create Icon and enter name of project and subproject Etc

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