How To Fix BTP_DL037 - RFC connection &1 from &2 to &3 is mandatory but &4 is optional

BTP_DL037 - Overview

• Message type: E = Error

• Message class: BTP_DL -

• Message number: 037

• Message text: RFC connection &1 from &2 to &3 is mandatory but &4 is optional

What causes this issue?

If an RFC connection is non-optional then also the source and the target
system type of the RFC connection must be mandatory.

How to fix this error?

Set the RFC connection as optional or remove the optional flag from the
participating system types.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BTP_DL037 - RFC connection &1 from &2 to &3 is mandatory but &4 is optional ?

  The SAP error message BTP_DL037 indicates an issue with the configuration of an RFC (Remote Function Call) connection in the context of SAP Business Technology Platform (BTP). The message states that a specific RFC connection is mandatory while another is optional, but the required connection is not properly configured or is missing.
  
  Cause:
  
  Missing Mandatory RFC Connection: The error typically arises when a required RFC connection (denoted as &1) is not set up or is incorrectly configured.
  Incorrect Configuration: The connection parameters for the mandatory RFC might be incorrect, leading to the system being unable to establish the connection.
  System 
  Configuration Issues: There may be issues with the system landscape configuration, such as missing entries in the RFC destination table.
  
  
  Solution:
  
  
  Check RFC Connections:
  
  Go to transaction SM59 in the SAP GUI.
  Verify that the mandatory RFC connection (indicated as &1) is correctly defined and active.
  Ensure that the connection parameters (like target host, system number, client, user credentials,