Data Transfer Between Two Systems with Remote Function

We’ll explore how to transfer data from one system to another using a remote-enabled function in the simplest way possible. Enjoy the read!

When performing SAP system migrations (like from R3 to S/4 HANA) or transferring data between systems, we employ various methods. One of the most commonly used methods is remote function calling. Here, we establish a connection between the source system (ECC or R3) and the target system (S/4 HANA). Summarized in detail, the steps are as follows:

First, we define the source system that we’ll connect to in the target system using transaction code SM59.

1. 

   

   Destination: This is the name we assign to the source system from which we want to pull data, Connection Type: Choose RFC connection to ABAP system (3).

Target Host: This is the server address of the source system from which we’ll pull data. If the system is already defined, you can directly enter the client of the source system, such as XXXR3DEV.

If you prefer not to enter a username and password each time the program runs or a query is sent to the source system, you can fill in these fields with the source system’s user credentials. This way, it won’t prompt for username and password for each transaction. If your username and password on the target system are the same as those on the source system, you can select the Current User checkbox.After completing and saving these settings,

You can test the connection to ensure it is correctly established by using the Connection Test button.

We've completed the first step in the target system

Now it's time to create our function module in the source system. Before proceeding with this step, let's create the table with the same structure in both systems for data transfer;

Let's populate this table with dummy data in the source system;

Let's create this table in the target system with the same fields as the one we created and populated in the source system;

Afterward, we create a Function Group in the source system using transaction code SE80;

Under the Function Group, let's create the Function Module;

An important step here is to ensure that the Remote-Enabled option is selected for the function module;

Here, function parameters such as Import and Export can be used, but to keep the explanation concise, I will directly send the table data to the target system;

Now that we've assigned the data to the return table, let's move on to the next step, where we create a program in the target system and call our function module; 

When we run the program

In this way, we transferred the table data smoothly between the two systems.

Thank you for your interest.