LSMW (Legacy System
Migration Workbench)

TABLE OF CONTENT
INTRODUCTION ..................................................................................................3
1. Create a project, sub project and object ........................................................4
2. Create Recordings.........................................................................................7
3. Maintain object attributes.............................................................................26
4. Maintain Source Structure ...........................................................................29
5. Maintain source fields ..................................................................................31
6. Maintain Structure relations .........................................................................44
7. Maintain field mapping and conversion rules...............................................45
8. Specify file for upload and create a file for upload .......................................56
9. Assign files...................................................................................................71
10.
Read data.................................................................................................72
11.
Display Read data....................................................................................74
12.
Convert data.............................................................................................77
13.
Display converted data.............................................................................78
14.
Create Batch input session ......................................................................81
15.
Run Batch input session...........................................................................82

INTRODUCTION
LSMW an abbreviation for Legacy System Migration Workbench is a tool in SAP which is used to migrate Legacy data into SAP.
It is a very important tool and easy to learn and master it.
LSMW has a recording tool which can record the transaction and the fields to be uploaded. Thus upload of master data and transaction data is made very simple in this tool.
You can use this tools in almost all modules for upload of master data and too some extent transaction data also.
Thus in FI you can upload the following master data through this:
Vendors, Customers, General Ledger, Asset master, Bank Master.
You can upload Transaction balance through this i.e. an FI document.
In CO you can upload the following master data:
Cost element, Cost center, Profit center, Activity types, Internal orders, Statistical key figures
In other modules likewise you can upload other sets of master data.
In this book we cover the creation of a Vendor master data with accounting view. Let’s get going then.

1. Create a project, sub project and object
Type LSMW in the command field

Click

Click

to continue.

If you do not want this message to appear every time,
You can click on the check box

Click on

to create a new project

Update the following fields:

Click
Create a subproject

Click
Create an object description

Click

2. Create Recordings
Now we will proceed to Recordings since we want to record a transaction (Create
Vendor Master data)
Important:
Please note that before you start the recording you should first actually perform this transaction manually and plan what data you want to capture for upload purpose. This is required so that you avoid doing mistakes while recording. While recording you should not press enter in between, you should only press enter after you have completed entering all the details on that screen.

Click on Goto à Recordings

Click

Click

Update the following:-

Update the following:-

Click

Update the following fields:

Click

We do not want capture anything here.

Click

to go to the next screen

Click

to go to the next screen.

Update the following:-

Click

Update the following:-

Click

Update the following:-

Click

Click

Click

to save the vendor master data.

to update the field name.

Click on
Make a note of these fields since they will be required later on.
You can export these fields to an excel sheet as follows:-

Select spreadsheet

Click

Click

to change the location

Click

Click
We will see the file later.
Click

Click

Click

3. Maintain object attributes
Here we maintain the attributes of the object VENDORS. We link the recording created to the object VENDORS.

Click

Click
Click radio button
Take a drop down in Recording

to select

Click
Click

4. Maintain Source Structure
Notice that the radio button has automatically moved to the next step Maintain source structures. Each time you perform a transaction the radio button moves to the next step automatically.
Also notice on the extreme right hand side under the column Last action (date, time, and user). This is updated with information each time the transaction is performed. Here we maintain the source structure for the LSMW.

Click

Click

Click

Update the following:-

Click
Click

5. Maintain source fields
Here we maintain the source fields which are to be updated with the data.

Click

Click

Position the cursor on
Click

Now we need to update the fields which you have captured in the recording.
In step 1 recording we had downloaded a file with the fields.
Let us open that file in excel.

Click

Click

Click

All the fields shown in column J needs to be mapped

Now go to SAP LSMW screen and copy and paste all these fields from excel.

To know the length of fields, go to the transaction code FK01 and enter the vendor code you just now saved. In our case we saved vendor code 100001
We want to know the length of the field Name

Position the cursor on field and press F1 function button on the keyboard or right click and select Help

Click

to see the technical information

Double click

The length of the field Name1 is 40 and the data type is character

Here you update the field name, the type of field whether C (Character, alphanumeric) or N (Numeric) and the length of the field

After updating all the fields
Click

Click
Click

Click
Click

6. Maintain Structure relations
We actually don’t do anything except click on change button and click on save button. Click

Click

Click

Click

7. Maintain field mapping and conversion rules
Here we create a link between the system fields and the source fields maintained in the earlier step.

Click

Click

Position the cursor on

and click

Double click

If you want to default the company code position the cursor on BUKRS and click

Update the following:-

Position the cursor on

and click

Double click

Position the cursor on NAME1 and click
Double click
Similarly map all the fields

To

.

Sometime you get a message ignore it. This is because you have maintained the length of the field which is more than the target field. If the source field is longer than the target field the text such as name, address could get truncated.

Click
Click

Click

8. Specify file for upload and create a file for upload
Here you attach the text file for upload.

Skip the Step Maintain fixed values, translations, user defined routines

Click
Click

Before we attach the file for upload, we must create this the file.

Use the file already downloaded for creating upload file

Copy column K and insert on a new worksheet

Right click and select

Click

Remove the blank columns in between

Now update the data for vendors to be uploaded into the system.

Save this file as an excel template for upload of Vendor master.
Thereafter delete the header row.

Now click on Fileà Save as

Click

Click

Click
Click

to close the file

Click
Check the text file to see if it is ok , whether it has no double quotes etc.

Open the text file from the location where it is saved.

There are some double quotes in the file, we need to remove this

Update the following:-

Click
Click

Close this file.
Now the file is ready for upload.
Go to the LSMW screen in SAP

Click

Double click

Take a drop down in the field file

Click

Update the following:-

Click

Click
Click

9. Assign files
We just click on change button and save the assignment.

Click
Click

Click
Click

10.

Read data

By executing this step the system actually reads the data from the upload file.

Click

Click

It shows the number of transactions read, written and not written.

Click

11.

twice

Display Read data

This step is very important. Here you come to know whether there are any errors.
Whether the data passed on from the file is mapped to correct field. So you should see a few records to see whether it is correct.

Click

Click

Double click

Click

twice

12.

Convert data

In this step the read data is converted.

Click

Click

Click

13.

twice

Display converted data

In this step we display the converted data. Again you should see one or 2 records to see that they are converted correctly.

Click

Double click on

Click

twice

14.

Create Batch input session

In this step we create the Batch input session for the upload data. The data is not updated when you create Batch input session.

Click

Click

15.

Run Batch input session

In this step, we execute the Batch input session. Data is actually updated here.
We should first execute the Batch input session for a few records in foreground.
After testing that the data is getting uploaded correctly, then you can execute this session in the background.

Click

Select

Click

Run the first record in foreground.

Click

Click

Click

Click

Click

Click

Click

Click

Click
Update the following:-

Click

After verifying that the first record is uploaded correctly, you can now run the batch input session in background.
Now again select and process in background for the next record

Click
Keep Pressing enter till the session goes away.

The Vendors are successfully updated.

That brings us to an end of creation and execution of LSMW.