How To Fix VFKK100 - Could not establish connection to accounting system

VFKK100 - Overview

• Message type: E = Error

• Message class: VFKK -

• Message number: 100

• Message text: Could not establish connection to accounting system

What causes this issue?

It was not possible to establish the RFC (Remote Function Call)
connection to target system &V1&, that is, to the accounting system
Contract Accounts Receivable and Payable (FI-CA).

System Response

You cannot enter your planned business transaction. Processing is
terminated.

How to fix this error?

Contact your system administrator.

Procedure for System Administrators

Check why the RFC connection to system &V1& cannot be established.

Error message extract from SAP system. Copyright SAP SE.

VFKK100 - Details

• The SAP error message VFKK100: Could not establish connection to accounting system typically indicates that there is an issue with the connection between the SAP system and the accounting system (often the Financial Accounting module, FI). This error can arise due to various reasons, including configuration issues, network problems, or system settings.
  Causes:
  
  
  Configuration Issues: The connection settings between the SAP system and the accounting system may not be correctly configured.
  Network Problems: There may be network connectivity issues preventing the SAP system from reaching the accounting system.
  Authorization Issues: The user may not have the necessary authorizations to access the accounting system.
  System Downtime: The accounting system may be down for maintenance or experiencing technical issues.
  RFC Connection Issues: If the connection is established via Remote Function Call (RFC), there may be issues with the RFC destination configuration.
  Transport Layer Security (TLS) Issues: If the connection requires secure communication, there may be issues with the TLS