Callback is not working on remote but working locally in SAP CRM

The issue lies in the class you are using for making a method call. This class is basically making RFC callback with the help of SAP GUI. So, when you are using the function builder, it works well because it has an SAP GUI connection present.

But when you are using an external system, the GUI is missing and it doesn't work.

Understanding the Problem

When working with SAP CRM, callbacks rely on the SAP GUI framework for proper execution. In a local environment, the SAP GUI provides the necessary interface layer for RFC (Remote Function Call) callbacks to function correctly. However, in remote environments or when integrating with external systems, this GUI layer is absent, causing the callback mechanism to fail.

Solution

What you can try is to use some other method which does not have an RFC callback and thus will not have any problem. Try to use create_with_table in place of your used method.

Alternative Approaches

Here are some recommended alternatives that work well in remote environments −

" Instead of using callback-dependent methods, use direct table operations
DATA: lt_table TYPE table_type.

" Use create_with_table method
CALL METHOD cl_your_class=>create_with_table
  EXPORTING
    it_table = lt_table
  IMPORTING
    ev_result = lv_result.

You can also consider using synchronous method calls or web services that don't rely on GUI callbacks when working with remote systems.

By switching to methods that don't depend on RFC callbacks, you can ensure consistent functionality across both local and remote environments in your SAP CRM implementation.