Overview of LTMC

By Imran, Mohammad February 16, 2023 under LTMC

The implementation of S4HANA is not complete without Data Migration. There are some tools such as BODS, IDoc, BAPI available to take care of the Data Migration activities but they are little complex hence a Data Migration consultant will be required even to deal with low volume data.

LTMC is a standard tool available in only S4HANA for data migration purposes and can be run by functional consultants or end users. This web based tool has various approaches to migrate data to S4HANA such as File based upload or Staging table based upload.
The tool has in-bulit objects to migrate the data such as Material Master, Customer, Sales Order or Purchase Order etc.

Access the tool

It can be accessed by running a t-code called LTMC from S4HANA screen. Once you hit enter a web browser with LTMC screen will open. You may notice some of projects created already by another users, you can use one of them or create your own if you want. Without a project you cannot proceed further.

Data Migration Approaches

There are basically three type of Migration aproaches in LTMC.

1. File based upload - You basicly need to download the inbuilt templates available for various objects in the form of XML and they can be opened in excel to fill the data in. This is suitable when you have less complex data migration requirements and volume is not huge. We will see below that how can we download the template and load in S4HANA. Step by Step process can be found here.


2. Staging Table based upload - You will have certain staging tables and those tables are your source tables to load the data in S4HANA. So, you will first need to insert records in these tables, BODS can be utilized to insert records in these tables. Once tables are ready with necessary data, you can then initiate the loading using LTMC tool. Step by Step process can be found here.


3. Direct Transfer Approach - In this approach, direct connection is created between SAP system to S4 Hana system for data transfer.

Data Migration Steps

1. Prepare the source data - The first step is to prepare the data in the template or in the staging table. you will need to download the template or import staging table.
2. Validate the data - In second the step LTMC validates the data and throws the errors if encountered during validation. This validation will be against your input data not against S4HANA.
3. Convert value or Mapping - This is the step where fields get mapped to LTMC target fields.
• This step is used for performing value mapping for fields from source to target. You can view, edit any source to target value mappings for fields in use.
• Correct mapping of all the fields is must in this step. You cannot proceed further if any of mapping left unmapped.
• If mapping found or you manually corrected the mapping then it will be displayed as green. No further action required.
• If mapping not found then it will be displayed as red. You will need to manually fix or click on auto-mapping.
• If the field is free-text and no mapping is required then it will be displayed as grey. No further action required.
4. Simulation of Data - LTMC does data simulation before actual load to see if there are any inconsistencies in the data or configuration. This check is against S4HANA.
5. Import Data -
   • This is the step where actually the data is migrated to system, you may see some errors on this step too.
   • if any errors encontered in this step, those records with errors will be skipped and rest of the data will be loaded to system.
   • A delta file with failed records will be automatically created and would be available for download in case of file approach.