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

E0737 - Overview

• 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.

E0737 - Details

• 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