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diff between lsmw and other

Former Member
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what is the main difference between lsmw and sesion,calltransaction method?


Former Member
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Hi Raj,

Check this out. May be of some help.

<b>What is main difference between session method and LSMW</b>

In the context of session method, the method of updating is “Batch Input” , we require a program to be coded, But in the context of LSMW method,The methods of updating using “Batch Input/Direction Input”from an IDOC,from a BAPI structure.No source code is required, the complete operation is performed in 16 steps sequence

Some more:

<b>What is main difference between CATT and LSMW</b>

Using LSMW you can update any kind of data but no changes to database are allowed, where as CATT tool can update only master data, which also allows changes to the master data and also a significant testing of data is possible

<b>What are the differences between CALL TRANSACTION and BATCH INPUT SESSION ?</b>-

The most important aspects of the <b>batch session</b> interface are:- Asynchronous processing- Transfers data for multiple transactions- Synchronous database updateDuring processing, no transaction is started until the previous transaction has been written to the database.- A batch input processing log is generated for each session - Sessions cannot be generated in parallel

The most important aspects of the <b>CALL TRANSACTION</b> USING interface are:- Synchronous processing- Transfers data for a single transaction- Synchronous and asynchronous database updating both possibleThe program specifies which kind of updating is desired.- Separate LUW for the transaction : The system performs a database commit immediately before and after the CALL TRANSACTION USING statement. - No batch input processing log is generated

Reward points if this Helps.


Message was edited by:

Manish Kumar

Former Member
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LSMW is a tool which is used to Upload the Data. Uploading the data also can be done by the function person. But When u compare with the Call Transaction or Session method here come the role of the technical consultant where coding part has to be done.



Former Member
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LSMW and BDC are vastly different.

LSMW can import data from legacy systems (e.g. in the form of Excel sheets or CSV files). For this, I guess, LSMW converts your data into batch input files automatically. If you use BDC, on the other hand, you have to write your batch input file yourself, line per line.

BDC (Batch Data Communication) is a technology used for data transfer. it is meant for transferring data thru SAP transactions itself. when u use BDC for data transfer, the sequence of steps is the same as when u use standard sap transaction screens for data upload. the only difference is that u can use different options for foreground/background processing.

LSMW on the other hand is a tool that helps migrate data from a legacy system (non-sap system ) to SAP system. it offers u various options to use either batch input, direct input, BAPIs or idocs. it involves a series of some 17-18 steps to migrate data.

Session method:

This method is also called as ‘CLASSICAL METHOD’.

Asynchronous processing.

Synchronous Processing in database update.

Transfer data for more than one transaction.

Batch input processing log will be generated.

During processing, no transaction is started until the previous transaction has been written to the database.


This is another method to transfer data from the legacy system.

Synchronous processing. The system performs a database commit immediately before and after the CALL TRANSACTION USING statement.

Updating the database can be either synchronous or asynchronous. The program specifies the update type.

Transfer data for a single transaction.

Transfers data for a sequence of dialog screens.

No batch input processing log is generated.

I hope it helps.

Best Regards,


*Please mark all the helpful answers

Former Member
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check this thread..

Active Contributor
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chk this.

Session method.

1) synchronous processing.

2) can tranfer large amount of data.

3) processing is slower.

4) error log is created

5) data is not updated until session is processed.

Call transaction.

1) asynchronous processing

2) can transfer small amount of data

3) processing is faster.

4) errors need to be handled explicitly

5) data is updated automatically

Session method is to populate the data by filling BDC structure

and keep as session to process from SM37 to post in appropriate Transaction.

Call transaction method is to post the data directly into the Transaction from an Executable program.