How To Fix E0737 - IDoc transfer: Logon to R/2 System failed

SAP Error Message - Details

• Message type: E = Error

• Message class: E0 - SAP EDI messages

• Message number: 737

• Message text: IDoc transfer: Logon to R/2 System failed

What causes this issue?

The SAP system cannot log on to the R/2 system.

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?

Check whether the following CPI-C users exist in the R/2 system:
Client: &v1&
User: &v2&
Password: &v3&
Language: &v4&

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E0737 - IDoc transfer: Logon to R/2 System failed ?

  The SAP error message E0737, which indicates "IDoc transfer: Logon to R/2 System failed," typically occurs when there is an issue with the connection between the SAP system and the R/2 system during the IDoc transfer process. Here are the potential causes, solutions, and related information for this error:
  Causes:
  
  Incorrect Logon Credentials: The user credentials (username/password) used to connect to the R/2 system may be incorrect.
  Network Issues: There may be network connectivity problems between the SAP system and the R/2 system.
  R/2 System Unavailability: The R/2 system may be down or not reachable due to maintenance or other issues.
  Configuration Issues: The RFC (Remote Function Call) destination settings may not be correctly configured in the SAP system.
  Authorization Issues: The user may not have the necessary authorizations to log in to the R/2 system.
  IDoc Configuration: There may be issues with the IDoc configuration or the message type being used.
  
  Solutions:
  
  Verify Credentials: Check the username and password used for the connection to the R/2 system. Ensure they are correct and have not expired.
  Check Network Connectivity: Use tools like ping or traceroute to verify that the SAP system can reach the R/2 system. Ensure that there are no firewall rules blocking the connection.
  Check R/2 System Status: Ensure that the R/2 system is up and running. If it is down, coordinate with the relevant team to bring it back online.
  Review RFC Destination: Go to transaction SM59 in the SAP system and check the configuration of the RFC destination pointing to the R/2 system. Test the connection to ensure it is working correctly.
  Check Authorizations: Ensure that the user has the necessary authorizations to log in to the R/2 system. This may involve checking roles and profiles assigned to the user.
  Review IDoc Configuration: Check the IDoc settings and ensure that the message type and other configurations are correctly set up.
  
  Related Information:
  
  Transaction Codes:
  
  SM59: To manage RFC destinations.
  WE02: To monitor IDocs and check their status.
  WE19: To test IDoc processing.
  
  
  Logs: Check the application logs (transaction SLG1) for more detailed error messages that may provide additional context.
  Documentation: Refer to SAP Help documentation for IDoc processing and RFC connections for more detailed troubleshooting steps.
  
  By following these steps, you should be able to identify and resolve the issue causing the E0737 error message during IDoc transfer.