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Added by Tarun Gambhir, last edited by Tarun Gambhir on Jan 08,
2009
ABAP Development / Data Transfers - BAPI, BDC, ALE, LSMW, DX-WB
/ LSMW
Steps to create a simple LSMW using batch input recording
The LSM Workbench is an R/3-based tool that supports you when
transferring data fromnon-SAP systems ("Legacy Systems") to R/3
once or periodically.
The tool supports conversion of data of the legacy system in a
convenient w ay. The data can then be imported into the R/3 system
via batch input, direct input, BAPIs or IDocs.
Furthermore, the LSM Workbench provides a recording function
that allow s to generate a "data migration object" in an entry or
change transaction
To start w orking w ith the LSM Workbench, use transaction
LSMW:
Click on the execute button once the project, subproject and the
object are created.
Click Back.Now record usingBatch Input RecordingData Migration -
Step by Stepvia
Batch Input Recording
Step 1: Maintain Object attributes
In this example, you will be updating the Material master
records with the help of
recording a transaction (MM01). Choose radio buttonBatch Input
Recordingand click
on the recording overview icon to record the R/3 transaction.
Enter
theRecordingname asMM01_REC2, the description asMM01 Recording
method, and
the transaction code asMM01.
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Click on the create button to create new project, subproject and
the object. As show n below .
-
Project, Subproject and Object:
On the initial screen, you can create a new project,
corresponding subprojects and objects via Edit -> Create new
entry.
- Project: An ID w ith a maximum of 10 characters to name your
data transfer project. If you w ant to transfer data from several
legacy systems, you may create a project e.g. for every legacy
system.
- Subproject: An ID w ith a maximum of 10 characters that is
used as further structuring attribute.
- Object: An ID w ith a maximum of 10 characters to name the
business object.
In the initial screen, All objects provides a list of all
projects created already. My objects displays a list of all objects
you created personally. All objects of the project
project as tree structure. Project documentation displays any
documentation w ritten for the individual popups and processing
steps. you can print the project documentation out, send it and
save it in
various f ile formats.
Click on the execute button once the project, subproject and the
object are created.
-
Click Back.Now record usingBatch Input RecordingData Migration -
Step by Stepvia Batch Input Recording
Step 1: Maintain Object attributes
In this example, you w ill be updating the Material master
records w ith the help of recording a transaction (MM01). Choose
radio buttonBatch Input Recordingand click on the recording
overview icon to
record the R/3 transaction. Enter theRecordingname asMM01_REC2,
the description asMM01 Recording method, and the transaction code
asMM01.
-
Click on create to record the transaction.
-
Click on Done.
Click on Done to actually start recording the transaction.
Enter the f ields required for recoding a transaction
successfully.
-
Note that the f ields are populated w ith default values. The
values you entered w hen you recorded the transaction are set by
default.
*Double-click on the f ieldRMMG1-MATNRand enter the name
asMATNRand the description asMATERIAL NUMBERand remove the default
as show n below :
-
Repeat this step for all f ields.Similarly, double-click on all
other f ields w ith default values and make appropriate changes.
Once you have made changes, the recording overview screen looks as
show n
below :
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Click on SAVE to save the recording. The click on BACK icon to
the main screen. Save the w hile going back to the main screen.
After completing the recoding the system w ill automatically
take you to the second step as show n below :
-
Step 2. Maintain Source Structures
Click on CREATE to create a source structure. Give a name and a
description to the source structure as show n below :
Save the source structure and go to the main screen.
Step 3. Maintain Source Fields
In this step, you need to list w hat f ields are present in the
source structure. The easiest w ay is to click on 'Table
Maintenance' icon to enter Fieldname, Type and Length for each f
ield as show n:
-
Save w hile coming back to the main screen.
Step 4: Maintain Structure Relations
Execute a step to 'Maintain Structure Relations'. Since, there
is only one Source and Target Structure, the relationship is
defaulted automatically.
Save w hile coming back to the main screen.
Step 5: Maintain f ield mapping and conversion rules
Keep cursor on f ield 'MATNR' and click on 'Assign Source f
ield' icon to choose source f ield MATERIAL from structure MM01V6
as show n
-
Similarly, assign 'Source Field' rules to the remaining f
ields.
Once all the f ields are mapped, you should have an overview
screen as show n
-
Save w hile coming back to the main screen.
Step 6: Maintain fixed values, translations, user-defined
routines
You can also maintain re-usable translations and user-defined
routines, w hich can be used across conversion tasks. In this case,
that step is not required.
Step 7: Specify files
In this step, w e define how the layout of the input f ile is.
The input f ile is a [Tab] delimited w ith the f irst row as f ield
names. It is present on my PC (local drive) as C:\MM3.txt.
Double Click on the legacy data.
-
Save w hile going to main screen.
Create an Excel w ith your data and save it as a Tab-delimited
text f ile on your local drive (C and name it MM3.txt.
IMPORTANT
****The Structure of the f lat f ile should be proper otherw ise
data w ill not be uploaded.. All the mandatory f ields should be
present in the f lat f ile for the required transaction
Step 8: Assign f iles
Execute step 'Assign Files' and the system automatically
defaults the f ilename to the source structure.
-
Save w hile going to main screen.
Step 9: Read data
In this step, LSMW reads the data from the source f ile (from
your PC's local drive). You have the option to read only selected
row s and convert data values to internal format.
Here 1 to 2 represents the number of row s to be read from the f
lat f ile. If you don't specify any number the system w ill read
all the row s from the f lat f ile. We have 2 row s in the f lat f
ile hence from 1 to 2.
-
After w e execute the data read from the f lat f ile is as show
n below .
Step 10: Display read data
This step is optional. If required, you can review the f ield
contents for the row s of data read.
-
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 f ields are mapped to target f ields.
Click BACK to come back to main screen.
-
Step 12: Display Converted data
Again this is an optional step to view how the source data is
converted to internal SAP format.
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.
Click EXECUTE button to execute a batch inout 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 Material master records are updated in
the system. You can confirm this by view ing the Material master
records (MM03).
-
Select the session and click on the PROCESS icon.
-
You can Process the session in foreground or background or can
only display errors.
Select the Processing Mode and then click on the PROCESS tab to
executive the session.
After the session is completely processed you can confirm this
by view ing the Material master records (MM03) or in the table
MARA.
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