How To Fix E1401 - Port & is not a tRFC port, no MDMP communication possible

SAP Error Message - Details

• Message type: E = Error

• Message class: E1 - Messages for IDoc Basis

• Message number: 401

• Message text: Port & is not a tRFC port, no MDMP communication possible

What causes this issue?

You want to use IDoc communication between a Unicode system and an MDMP
system.
This type of communication is possible for tRFC ports only. You want to
send this IDoc to a port with another type.

System Response

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

How to fix this error?

If you do not want to send the IDoc using MDMP communication, it can be
switched back to the status 30 using transaction BD87. You can then send
this IDoc using the standard report RSEOUT00.
If you want to send the IDoc using MDMP communication, you must change
the port to a tRFC port in transaction WE21.

Procedure for System Administrators

Inform your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E1401 - Port & is not a tRFC port, no MDMP communication possible ?

  The SAP error message E1401 indicates that the specified port is not configured as a transactional RFC (tRFC) port, which is necessary for certain types of communication in SAP systems, particularly for asynchronous communication between different SAP systems or between an SAP system and external systems.
  Cause:
  
  Incorrect Port Configuration: The port specified in the error message is not set up as a tRFC port in the SAP system.
  Missing Configuration: The necessary configuration for tRFC communication may not have been completed.
  Network Issues: There may be network-related issues preventing proper communication.
  System Settings: The system settings may not allow for tRFC communication due to restrictions or misconfigurations.
  
  Solution:
  
  
  Check Port Configuration:
  
  Go to transaction SM59 (RFC Destinations).
  Locate the RFC destination that corresponds to the port mentioned in the error message.
  Ensure that the destination is configured as a tRFC destination. You can check the settings under the "Technical Settings" tab.
  
  
  
  Create or Modify tRFC Port:
  
  If the port is not configured as a tRFC port, you may need to create a new RFC destination or modify the existing one.
  Ensure that the "Connection Type" is set to tRFC.
  
  
  
  Check Logical System Configuration:
  
  Ensure that the logical systems involved in the communication are correctly defined in transaction SALE (Logical System).
  Make sure that the logical systems are assigned to the appropriate clients.
  
  
  
  Review Communication Settings:
  
  Check the settings in transaction SMQS (tRFC Queue Monitor) to ensure that there are no issues with the queues.
  Verify that the necessary background jobs for tRFC processing are running.
  
  
  
  Network Configuration:
  
  Ensure that there are no firewall or network issues preventing communication between the systems.
  Check if the necessary ports are open and accessible.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to tRFC configuration for additional guidance.
  
  
  
  Related Information:
  
  tRFC (Transactional RFC): A type of RFC that ensures that the data is processed exactly once, even in the case of system failures.
  SM59: Transaction code used to manage RFC destinations in SAP.
  SMQS: Transaction code used to monitor tRFC queues.
  SALE: Transaction code used to manage logical systems and their assignments.
  
  If the issue persists after checking the above points, it may be beneficial to consult with your SAP Basis team or refer to SAP support for further assistance.