Presentation on theme: "LSMW Legacy System Migration Workbench"— Presentation transcript:
1LSMW Legacy System Migration Workbench This In-house course was developed to meet the needs of SAP R/3 Consultants working at Capgemini. This course is designed to present a high level view of LSMW and to provide the Consultants with information about how to use this Functionality.Your comments at the conclusion of this training session are appreciated and will help us better tailor future courses to meet your training needs.
2Legacy System Migration Workbench PrepareMe1TellMe2ShowMe3LetMe45HelpMe
4What is Data migration?In an SAP R/3 implementation the data from legacy system (non SAP R/3) needs to be transferred to the SAP systemPeriodic data transfer between R/3 and other system (interfacing) is also requiredBoth of the above form a part of data migration
5Significance of data migration Data migration comes in the end of R/ implementation.To start with Data Migration first configuration should be fully completedData migration is about 20% to 40% of the total implementation expenses.
6Data migration tools The tools for data migration are:- BDC (Batch Data Communication)LSMW (Legacy System Migration Workbench)
7Difference between BDC & LSMW LSMW offers different technique for migrating data: Direct input, BAPI, Idoc, Batch input recording. While BDC basically uses batch input sessions and CALL TRANSACTION method.Limit on number of records which can be uploaded in one session of BDC (999 records). No such limit in LSMW.LSMW is more to do with configuration while BDC involves programming.
9What is LSMW?The LSM Workbench is an R/3-based tool that supports you when transferring data from- Non-SAP systems ("Legacy Systems") to R/3- Once or Periodically.The tool supports conversion of dataThe data can be imported into the R/3 system via- Batch Input- Direct Input- BAPI’s- IDocs.
10LSMWThe LSM Workbench is a tool that supports data transfer from non-SAP systems to R/3. The main functions of the LSM Workbench are:- Import data (legacy data in spreadsheet tables and/or sequential files)- Convert data (from source format to target format)- Import data (into the database of the R/3 application)
11Principles of LSM Workbench Basic Principles of LSM workbench:-Most of the functions should reside in R/3. No collection of individual programs on different platforms.The quality and consistence of the data imported into R/3 should be more important than speed and performance of data migration.Existing knowledge and coding should be used.The developed ”mapping" and rules should be reusable and thus be used repeatedly in projects.
12Features of LSMW Features:- Integrated in R/3 and thus independent of individual platformsThe import technique to be used in an individual case, depends on the business object as well as on the availability of standard input programsData consistency due to standard import techniques:Batch inputDirect inputBAPIs (Business Application Programming Interfaces)IDocs (Intermediate Documents)Structured way of working, because you have to finish every step before starting the next step
14Pre-requisites for LSMW Make sure that SAP customizing is finished.Run the relevant transaction in the SAP system manually with test data from the legacy system and see which fields must be filled. There may be required fields that do not correspond to data fields in the legacy system. In such a case, one should better assign a fixed value or establish an optional field for data transfer.Map the fields in advance in written form: Assign the source fields to the target fields.Determine the form in which non-SAP data will be transferred into the SAP system (e.g. via "Move" or according to a rule).
15Import methods…Preferred methods of input are described in order of preference:IDOC’sAdvantages: Fast to load, easy processing, low programming for standard IDOC’sDisadvantages: Good knowledge of IDOC processing required, time consuming if changes have to be made to a created IDOC2. BAPI’sAdvantages: Fast to load, easy processing, logical interface for functional/end user based on the business processes involved.Disadvantages: Not always complete with all input fields of a transaction
16Import Methods… 3. Standard/Direct Input Advantages: Well tested method, Fast to load, easy processing.Disadvantages: No enjoy transactions, not always complete with all input fields of a transaction.4. Batch InputAdvantages: Easy modifiable, all fields are available, easy re-processing.Disadvantages: Comparatively slow, to use new screens or tabs a new recording has to be created, not easily usable for enjoy transactions, dependant on user settings, difference in foreground and background processing may occur.
18Getting StartedHere is an example showing the way to use the conversion tool LSMW in SAP. It starts in the start-up screen of LSMW transaction and ends with a screen on which the results of the conversion are displayedIf you want to create or change objects, make sure that you are working in change mode. To activate this mode, click Change in the corresponding processing step. Only this mode provides all functions required for changing objects
19Step 1 - Enter transaction LSMW Enter the transaction code (LSMW) or add this transaction to your favourites (right-click with your mouse on the Favourites map in the start menu and choose Insert transaction, type lsmw and press enter), since LSMW is an additional transaction, it is not available in the standard SAP menu.
20Step 2 – project, subproject, objects At the initial screen, you can create a new project, corresponding subprojects and objects via Edit -> Create new entry. Alternatively you can select from an existing projectProject: An ID with a maximum of 10 characters to name your data transfer project. If you want to transfer data from several legacy systems, you may create a project e.g. for every legacy systemSubproject: An ID with a maximum of 10 characters that is used as further structuring attributeObject: An ID with a maximum of 10 characters to name the business object
21Step2 contd..- At 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 Project Objects’ displays all objects of the selected project as tree structure.- ‘Project Documentation’ displays any documentation written for the individual pop-ups and processing steps. You can print the project documentation out, send it and save it in various file formats.- Select ‘Documentation’ to enter your notes. After clicking, a popup is displayed in which you can write down your personal documentation.
22Initial ScreenBy clicking the button execute or pressing the F8 key on your keyboard you go to the object, you selected.By clicking the button create a new object for the selected project and subproject with the name entered in the object field is created.By positioning the cursor on an entry and clicking on the button documentation, you can add change or delete comments.
23Administration - list of existing projects SubprojectIn the initial screen, you can display the administration functions via the menu path Goto Administration. Here you can find a list of all existing projects.It enables you to create, process, display, delete, copy or rename projects, subprojects, objects and reusable rules.By double-clicking on an entry you can branch to the entry display.Object
24Step 3 – ExecuteOnce the project and subproject along with the object are determined we execute to find the list of steps to be performed for data transfer
26Process stepsThe number of process steps is dynamic and shall depend on factors like input methodBy clicking the ‘User menu’ button one can select – deselect the Process stepsTo proceed through the processing steps one needs to start from the first one and execute each of themA step can be skipped by selecting the next available processing steps’ radio button
27Maintain object attributes Choose if the data transfer is once or periodicIf Batch input recording is selected one can enter further recordings by clicking at the arrowChoose method for input of data.In the method to input data from a BAPI, one needs to select the Business Object and the corresponding method.
28Application Toolbar in Process steps User Menu: Here you can make an individual selection from the displayed processing steps. Pressing button ‘Main steps’ automatically activates all processing steps mandatory for a data conversion.Numbers On or Off: You can activate or deactivate the numbering of the individual processing steps.Double click = Display or Double click = Change: Here, you can determine whether display mode or change mode is selected by double clicking.Object overview: Displays all object information for the selected object.Information includes object information, source structures, target structures, structure relations, source fields, target fields, field mapping.Action log: Displays a detailed overview for all processing steps already carried out. You can reset the action log via the menu path Extras -> Reset Action Log. This action is stored with a reference to the user and the date.
29Maintain Source structures In the step ‘Maintain Source Structures’ you define the structures of the object with name, description and the hierarchical relationships:Click on Change button. You can now define, change, reassign or delete structures. All these functions are available via pushbuttons.When you define more than one structure, a popup is displayed querying the relations between the structures: equal/subordinate?Note: For migration objects created via transaction recording, you may only define one structure per recording, since only one flat target structure per recording is available.
30Maintain source fields In the step ‘Maintain Source Fields’, fields are created and maintained for the source structure defined in the preceding stepUse source fieldnames with the same names as the target fieldnames as much as possible, because it allows you to use the ‘auto-field mapping’ function in step 5 ‘Maintain field mapping and conversion rules’.
31Maintain source fields Different possible ways of defining and maintaining the source fields:Make sure that you are in change mode and the cursor is positioned on a source structure or an existing source fieldCreate Individual source fields - By clicking on the button ‘Create source field’ you can specify the field name, field label, field length and field typeDuring data read, you can specify whether date values are converted into the internal date format (YYYYMMDD) and amount fields are converted into the calculation format ( )‘Selection Parameter’ can be set during Read/Convert data. If you select this indicator, the corresponding field is made available as selection parameter when reading or converting data.2. Maintain Source Fields in Table Form – Clicking on the ‘Table Maintenance’ button displays the fields in a tabular format.
32Maintain source structure… contd Different possible ways of defining and maintaining the source fields:3. Copy Source Fields from Other Sources : By selecting ‘Copy Source Fields’ displays the following options:- Upload (Text separated with Tabs) – The source field description is stored in a text file the columns of which are separated by tabs- Copy from Another Object – Source field can be copied from source structure of another object- Copy from Data Repository – Source field can be copied from a structure in SAP Data Repository- From Data File (Field Name in 1 Line) - Source fields can be copied from a data file which should be stored on the PC in the form of text separated by tabs and contain the fields in the first line.
33Maintain structure relations In the step ‘Maintain Structure Relations’, the structural relationships between source and target structures are defined. The possible target structures are defined during the selection of the object type and the import techniqueTo define structural relationships, position the cursor on the field target structures. Clicking create Relationship button opens a window that displays the existing source structures for selectionIf you want to change the relation, remove the existing relation first. In addition, you can use Check to check the structural relationships for errors
34Maintain Field mapping & conversion rules In the step ‘Maintain Field Mapping and Conversion Rules’, you assign source fields to target fields and define how the field contents will be convertedAll fields of target structure, which you selected in the previous step, will be displayed.For each target field the following information is displayed:- Field description- Assigned source fields (if any)- Rule type (fixed value, translation etc.)- Coding
35Maintain Field mapping & conversion rules Layout determinationThe layout of the ‘Maintain field mapping’ screen can be determined. i.e. we can decide whether the ‘Global data’, ‘Technical fields’ should be displayed
36Maintain Field mapping & conversion rules To assign a source field, position the cursor on a target field in the tree structure and select Assign source field.This displays a list of all available source fields for selection. You can assign the fields by double-clicking on them as well
37Maintain Field mapping & conversion rules After assigning the source fields, you define the conversion rules. The default rule is ‘Move’. However, you can select various standard techniques via pushbutton:The target field is assigned coding carrying out field contents conversion using a translation tableThis deletes the coding assigned to the target field. In addition, source fields assigned to the target fields are removed as well.A ‘fixed value object’ (variable) named FV_<fixed value> is assigned to the target field. This fixed value object is filled with an actual value in step ‘Maintain Fixed Values, Translations, User-Defined Routines’.The target field is assigned a fixed valueThe data is transferred using ABAP command ‘Move’
38Maintain field mapping & conversion rules By clicking this button, after clicking once on a target field (in blue), LSMW displays the list of available source fields, by choosing one the standard rule ‘move’ is used to link the 2 fieldsBy clicking this button, after clicking once on a target field (in blue), the source field is deleted from the target fieldBy clicking this button, the display of this step can be changed. There are possibilities to show or hide several aspects of the field mappingBy clicking this button, a syntax check is performed for the conversion program, generated from the field mappingThese 3 buttons, which are available for every target field, display the help function (‘I’), the possible entries (?) and the last one displays the documentation in LSMW
39Maintain Fixed values, translations… In the step ‘Maintain Fixed Values, Translations, User-Defined Routines’, you can process the reusable rules of a project, which are defined at project level, so they are the same for all objectsFixed value: Here you can specify the length, type flag for lowercase/uppercase and value in addition to the name of the field.Translation: Here you can enter information on the source field and the target field. If you are creating a new translation you have to save data first before you can change itUser Defined Routines: This routine can be re-used in other objects of the project. The system adds in ‘ur_’ to the name that you suggest to use for this routine. It opens up an editor wherein you can enter your ABAP code
40Process Step- Specify File In the step ‘Specify Files’, you describe all files to be usedIf your legacy data is on the PC: In change mode, position the cursor on the line ‘Legacy data On the PC (Front-end)’. Select Add entry. A popup is displayed. Specify file path, file name and description and other propertiesIf your legacy data is on the R/3 server: In change mode, position the cursor on the line ‘ Legacy data On the R/3 server (application server)’. Select Add entry. A popup is displayed. Specify file path, file name and description and other propertiesFile for Imported data: Here, the file name is entered with file extension ’.lsmw.read’.File for Converted data: Here, the file name is entered with file extension ’.lsmw.conv’. This filewill contain all your converted data after applying the conversion rules if any.
41Process Step – Assign File In the step ‘Assign Files’, you can assign the file name in step 7 declared as source file to the target structure defined in step 2 .If you click on the Assign File button, after clicking once on a target structure (in yellow), LSMW displays the list of available source files.If you click on the Delete Assignment button, after clicking once on a target structure (in yellow), the source file is deleted from the target structure.
42Process step – read data In the step ’Read Data’, the file specified in previous step is, as linked to the target structures in . Even though you can select a range of transaction numbers, the whole file is being read, only the amount of transactions written is influenced. So for tests it is easier to read all data and convert only a certain range, because in that step the program stops after finishing the range.
43Process Step – Display read data In the step ‘Display Read Data’, you can display the read data, choosing to show all read data or an interval as shown above. The data are shown as the source structures, in case more source structures are being used in one transaction, the hierarchy of the transaction is displayed by the use of a different colour legend. By clicking on one of the lines, you proceed to the field level of the line, where you can check the read data as shown below.
44Process Step – Convert data In the step ‘Convert Data’, works like the step ‘read data’, but uses the conversion program instead of the read program. You can define a range of transactions to be converted, at the end of this range the conversion program stops running.Note: It is recommended that when you load big amount of data in production, load the first 10 records so that you can check and change when necessary.
45Process Step - Display converted data In the step ‘Display Converted Data’, you can display the converted data, choosing to show all converted data or an interval as shown above. The data are shown as the target structures, in case more target structures are being used in one transaction, the hierarchy of the transaction is displayed by the use of a different colour legend. By clicking on one of the lines, you proceed to the field level of the line, where you can check the converted data as shown below.
46Process StepAfter the step ‘Display Converted Data’ the exact content of the next steps may differ, depending on the import technique that you have chosen in step 1. The steps displayed by the program for the different import techniques are:Standard batch input or recording:Generate batch input sessionRun batch input sessionStandard direct input:Start direct input sessionBAPI or IDoc:Start IDoc creation Start IDoc processingCreate IDoc overviewStart IDoc post-processing
48Practical LSM Workbench Exercise 1Create LSMW object and upload Vendor Master data to SAPAnalyzing the test data (in attached XLS file) select the appropriate upload methodDevelop simple LSMW object - No major conversions required
49Practical LSM Workbench Exercise 2Create LSMW object and upload Purchase Requisition data to SAPAnalyzing the test data (in attached XLS file) select the appropriate upload methodDevelop simple LSMW object - No major conversions required
51Using Direct Input method We now look at an example to change Customer master record using the direct input method.Specifications:Object : Customer MasterMethod : 0000Program Name: RFBIDE00Program Type :B
52Using Direct Input method Step 1: Enter transaction LSMWStep 2: Enter project, subproject and object
53Using Direct input method Step 3: Enter the descriptions for Project, Subproject and Object as prompted
54Using Direct Input method Step 4: Click on execute. The process steps are displayed (the process steps displayed depend on the input method chosen)
55Using Direct Input method Step 5 : Select the 1st Process Step “Maintain Object Attributes” and select “Execute” and select ‘Standard Batch/ Direct input’. Enter the data as shown
56Using Direct Input method Step 6: Save and Click at BackStep 7:Maintain Source Structure
58Using Direct Input method Step 9 : Maintain Source FieldsClick at the table maintenance icon, to specify the fields.
59Using Direct Input method Step 10: Maintain structure relationsStep 11: Execute, structures for standard object ‘0050’ are displayed.
60Using Direct Input method Step 12: Place cursor at the target structure and click at create relationship icon
61Using Direct Input method Step Maintain Field mapping and conversion rules- Place cursor at the field ‘TCODE’ in ‘BNK00’ and click at ‘Rule’ Then choose ‘Constant’ and enter ‘XD02’.
62Using Direct Input method Step 14: Place cursor at the fields and click at the ‘Source Field’ icon to map with the respective field in the source.The above is applicable for BNK00, BNKVV and all the other structures assigned ‘XD02S’ in source relation
63Using Direct input method Step 15 : Specify FilesEnlist files wherefrom legacy data would be extracted.
64Using Direct input method Step 16: Assign filesThe structure XD02S is correlated with the specified file.
65Using Direct input method Step 17: Read data from legacy files.
66Using Direct input method Step18: Display the read data
67Using Direct input method Step 19: Create batch input session
68Using Direct input method Step 20: Execute the batch input session
70Using Batch Input Method The Sessions method provides more flexibility since user can record any transaction required.In the following slides we observe the differences between the Sessions and the ‘Direct Input method’ for the same scenario – Change customer Master data.
71Using Batch Input Method Create Project, Subproject and Object in transaction LSMWStep – ‘Maintain Objects attributes’, select ‘Batch input recording’. Enter the recording name if a recording already exists else create a new one by clicking at the icon ‘Recording overview’Recording overview key
72Using Batch Input Method Recording..During the recording the system calls the transaction code XD02 and prompts you to complete the Change.Select at least one area of processing .
78Using BAPI in LSM Workbench We now go through a step by step process of realizing LSMW through a BAPIDetails of BAPI used:- Business Object: BUS2012- Method: CreateFromData Details of Message Type and Basic IDoc Type:- Message Type: PORDCR- Basic IDoc Type: PORDCR02
79Using BAPI in LSM Workbench Step 1 : Go to transaction LSMWStep 2 : Enter project, subproject and object and click on Create
80Using BAPI in LSM Workbench Step 3: Enter the descriptions for Project, Subproject and Object as prompted
81Using BAPI in LSM Workbench Step 4: Now select Settings IDoc Inbound Processing
82Using BAPI in LSM Workbench Step 5 :“IDoc Inbound Processing” screen appears. Enter the required details as shown below:Step 6 :Click on “Activate IDoc Inbound Processing”.
83Using BAPI in LSM Workbench Step 7 : Click on “Yes” when prompted for “Activate IDoc Inbound?”Step 8 : Hit on “Back” to return to the main screen
84Using BAPI in LSM Workbench Step 9: Click on Continue (F8). Following Screen appears
85Using BAPI in LSM Workbench Step 10: Select the Step 1 “Maintain Object Attributes” and select “Execute”
86Using BAPI in LSM Workbench Step 11 : Select the radio button “Business Object Method” and enter the following details:Business Object: BUS2012Method: CreateFromData
87Using BAPI in LSM Workbench Step 12: Save and click on BACK button. Following information message is displayedStep 13: Maintain Source Structure
88Using BAPI in LSM Workbench Step 14:Create source structure ‘HEADERDATA’ and a lower level structure ‘ITEMDATA’Save and go back to main screen
89Using BAPI in LSM Workbench Step 15 : Maintain source fieldsEnter the fields as shown below:
90Using BAPI in LSM Workbench Step 16:Maintain Structure Relations
91Using BAPI in LSM Workbench Maintain structure relations:- Select ‘E1PORDCR’ in previous fig. and click on CREATE Relationship. Following screen appears:- Select HEADERDATA and hit ENTER. Do the same for otherstructures
92Using BAPI in LSM Workbench Step 17 :Maintain Field mapping and conversion rules. Maintain field mapping as shown:-
93Using BAPI in LSM Workbench Step 18 : Specify FileProvide the link for the test file. Maintain the same structure of the test file as defined before
94Using BAPI in LSM Workbench Step 19: Select ‘Assign Files’ & executeStep 20: Read DataStep 21: Display read data
95Using BAPI in LSM Workbench Step 22: Return to main screen and select ‘Convert Data’ followed by ‘Display Convert Data’
96Using BAPI in LSM Workbench Step 23: Return to main screen and select “Start IDoc generation”
97Using BAPI in LSM Workbench Step 24 : Process Idoc through the step ‘Start Idoc Processing’ on main screen
98Using BAPI in LSM Workbench Step 25: Click on ‘Create Idoc Overview’ on the main screen. Here the data record and status record of the Idoc can be viewed
100HelpMe Object Overview Complete overview of Data Migration object can be obtained from the Menu: Extras Object OverviewOverview in List formatOverview in Table format
101HelpMeObject Overview cont…Overview in List format
102HelpMeObject Overview cont…Overview in Table format
103HelpMe Settings for IDoc inbound processing This can be obtained from the initial LSMW screen Menu: Settings Idoc Inbound ProcessingSpecify the following:File/tRFC portPartner TypePartner NumberThese can be maintained by clicking on the respective buttons on the right.Click on the Activate IDoc Inbound Processing button after entering all thedetails above.
104HelpMe To transport data migration objects This can be done in 2 ways: By generating a change request orBy import/export of a project from one system to anotherFrom the initial LSMW screen Menu: Extras See screen print below
105Help Me Problems Solutions Recording Fields cannot be seen in the field mapping after a recording has been created.Check to see whether the field names have been maintained correctly in the recording process.From the list of steps, choose Maintain source fields.Check the names of the source fields. If they are missing, double-click on the corresponding field to branch to the Change source field dialog box.Fill in the corresponding fields.Confirm by choosing Continue.Repeat the recording process.
106Help Me Problems Solutions The source file contains data in one data record out of which to records are to be created after conversion.In step Maintain field mapping and conversion rules, choose the transfer record function.Error message during/after importSee the object attributes to determine which import program was used, and search for documentation and notes on this import method directly.