Step by step LSMW Guide

LSMW to Update Customer Master Records with Transaction Recording

  

Call Legacy System Migration Workbench by entering transaction code LSMW. Every conversion task is grouped together as Project / Subproject / Object structure. Create a Project called LSMW_DEMO and a Subproject as CUSTOMERS and Object as CUST_REC as shown in Figure 1.

Figure 1  Conversion Task with Project, Subproject and Object

The main screen of LSMW provides wizard-like step-by-step tasks, as shown in Figure 2. To complete your data conversion, you need to execute these steps in sequence. Once a step is executed, the cursor is automatically positioned to the next step.

Note that these steps may look different depending upon your Personal menu settings. You could make step numbers visible by ‘Numbers on’ icon or hidden by ‘Numbers off’ icon. You can execute a step by double-clicking on the row. Toggle icon ‘Doubleclick=Display’ or ‘Doubleclick=Edit’, makes the step in ‘display’ mode or ‘change’ mode.

Figure 2 LSMW Wizard – initial screen

Step 1: Maintain Object attributes

In this example, you will be updating the customer master records with the help of recording a transaction (XD02). Choose radio button Batch Input Recording and click on the recording overview icon to record the R/3 transaction. Enter the Recording name as XD02_REC, the description as Customer Master Updates Recording, and the transaction code as XD02.

Figure 3  Object type ‘Transaction Recording’

The system calls the transaction code XD02 and prompts you to complete the Change

Customer transaction, as shown in Figure 4. Enter the key customer information (I entered customer number 1000, sales organization 1000, distribution channel 01, and division 00) and choose ‘Sales’ view within ‘Sales area data’. Make changes to these three fields (I entered, sales office 1010, sales group 110, and customer group 01) and save the transaction.

Figure 4  Transaction recording for Transaction Code ‘XD02’

Once the transaction is completed, R/3 records the flow of screens and fields and saves the information, as shown in Figure 5.

Figure 5  Transaction recording overview

Note that the fields are populated with default values. The values you entered when you recorded the transaction are set by default.

Note that if you have more fields in the recording than needed, you can remove them by clicking ‘Remove Screen field’ icon. 

Observe that the transaction-recording process stores field names in a technical format. By pressing the F1 key on individual screen fields and then pressing the F9 key, the system displays technical names. You then can replace the technical names with descriptive names. Double-click on the field RF02D-KUNNR and enter the name as KUNNR and the description as Customer Account Number and remove the default value. (See Figure 6.)

Figure 6  Field attributes

Similarly, double-click on all other fields with default values and make appropriate changes. Once you have made changes, the recording overview screen looks like what you see in Figure 7.

Figure 7  Transaction Recording Overview – with screen field attributes

Save your changes. When you go back to the initial screen, you will see that the initial screen steps have changed. Since you want to import data via the BDC method, the Direct Input and IDoc-related steps are hidden, as they are not relevant.

Step 2. Maintain Source Structures

Give a name and a description to the source structure (Figure 8).

Figure 8  Source Structure

Step 3. Maintain Source Fields

In this step, you need to list what fields are present in the source structure. The easiest way is to click on ‘Table Maintenance’ icon to enter Fieldname, Type and Length for each fieldas shown in Figure 9 

Figure 9  Source fields of source Structure

Note that your input file will have four fields as key fields and you need to update three fields in the system.

Step 4: Maintain Structure Relations

Execute a step to ‘Maintain Structure Relations’. (See Figure 10.) Since, there is only one Source and Target Structure, the relationship is defaulted automatically.

Figure 10  Structure Relation

Step 5: Maintain field mapping and conversion rules

Field RF02D-D0310 represents that you chose ‘Sales view’ for the customer Master screen accordingly its value should be set to X. Keep your cursor on field RF02D-D0310 and click on Constant rule icon to choose the constant value of ‘X’.

If your source file already has the field value, you choose rule ‘Source Field’.

Keep cursor on field ‘KUNNR’ and click on ‘Assign Source field’ icon to choose source field CUSTOMER from structure XD02S as shown in Figure 11.

Figure 11  Assign source fields

Similarly, assign ‘Source Field’ rules to the remaining fields.

Once all the fields are mapped, you should have an overview screen as shown in Figure 12.

Figure 12  Field mapping and Conversion rules overview

Step 6: Maintain fixed values, translations, user-defined routines

You can also maintain re-usable translations and user-defined routines, which can be used across conversion tasks. In this case, that step is not required.

Step 7: Specify files

In this step, we define how the layout of the input file is. The input file is a [Tab] delimited with the first row as field names. It is present on my PC (local drive) as C:\XD02.txt. (See Figure 13.)

Figure 13  File attributes

Create an Excel file (Figure 14) with your data and save it as a Tab-delimited text file on your local drive (C:\) and name it XD02.txt.

Figure 14   Source data in Excel file (saved as Tab delimited file)

Step 8: Assign files

Execute step ‘Assign Files’ (Figure 15) and the system automatically defaults the filename to the source structure.

Figure 15 Assign file to Source Structure

Step 9: Read data

In this step, LSMW reads the data (Figure 16) from the source file (from your PC’s local drive). You have the option to read only selected rows and convert data values to Internal format.

Figure 16  Read Data

Step 10: Display read data

This step (Figure 17) is optional. If required, you can review the field contents for the rows of data read.

Figure 17  Display Read Data

Step 11: Convert data

This is the step that actually converts the source data (in source format) to a target format. Based on the conversion rules defined, source fields are mapped to target fields.

Step 12: Display Converted data

Again this is an optional step to view how the source data is converted to internal SAP format (Figure 18).

Figure 18  Display Converted Data

Step 13: Create batch input session

Once the source data is converted in an internal format, you can create a batch session to process updates (Figure 19).

Figure 19  Create Batch Input Session

Step 14: Run Batch Input Session

You can execute the BDC session by Run Batch input session. Executing a batch input session is a standard SM35 transaction for managing BDC sessions. Once you have successfully executed the batch input session, the customer master records are updated in the system. You can confirm this by viewing the customer master records (XD03).

Note! Browsing thru these 14 steps, you may get a feeling that this is a very lengthy and time-consuming activity. However, for the purposes of demonstration, I have made it detailed. Although it looks lengthy, actually it takes hardly few hours from start-to-finish! After playing around with few simple LSMW scripts, you will find it so easy to change and create more complex ones.