How To Fix CRM_SSC019 - Function module &1 does not conform to the interface

CRM_SSC019 - Overview

• Message type: E = Error

• Message class: CRM_SSC - Screen Sequence Control - CRM Transaction

• Message number: 019

• Message text: Function module &1 does not conform to the interface

What causes this issue?

The function module &V1& does not meet the conditions of the screen
sequence control or its import/export structures.

System Response

It is possible that this configuration does not produce the desired
results.

How to fix this error?

To resolve this problem, inform your System Administration.

Procedure for System Administrators

Function modules which are to be used for selecting screen control
data, must have an import structure with the name IS_GEN_COM from
category CRMT_SSC_FU_EXP_COM, as well as an export structure with the
name ES_GEN_COM from category CRMT_SSC_FU_IMP_COM.

Error message extract from SAP system. Copyright SAP SE.

CRM_SSC019 - Details

• The SAP error message CRM_SSC019 indicates that a function module does not conform to the expected interface. This typically occurs in the context of SAP CRM (Customer Relationship Management) when a function module is called, but the parameters or the structure of the function module do not match what is expected by the calling program or the interface definition.
  Causes:
  
  Mismatch in Parameters: The function module may have been modified, and the parameters (input/output) do not match the expected signature.
  Versioning Issues: If the function module has been updated or changed in a newer version of the system, the calling program may still be using an older version of the interface.
  Custom Development: If the function module is a custom development, there may have been changes made to it that were not reflected in the calling program.
  Transport Issues: If the function module was transported from one system to another (e.g., from development to production),