How To Fix B1608 - R/2 rejects logon, for details refer to R/2 system log

B1608 - Overview

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 608

• Message text: R/2 rejects logon, for details refer to R/2 system log

What causes this issue?

No authorization for logon on the R/2 system.

How to fix this error?

Check the settings in the transaction SM59 for the receiving
R/2 system.
The sending of this IDoc will not be repeated.

Error message extract from SAP system. Copyright SAP SE.

B1608 - Details

• The SAP error message B1608 "R/2 rejects logon" typically indicates that there is an issue with the connection between the SAP R/3 system and the R/2 system. This error can occur for several reasons, and understanding the cause is essential for troubleshooting.
  Causes:
  
  Incorrect Logon Credentials: The username or password used to log on to the R/2 system may be incorrect.
  User Authorization Issues: The user may not have the necessary authorizations to log on to the R/2 system.
  Network Issues: There may be network connectivity problems between the R/3 and R/2 systems.
  
  Configuration Issues: The connection settings between the R/3 and R/2 systems may not be configured correctly.
  R/2 System Down: The R/2 system may be down or not reachable at the time of the logon attempt.
  Expired User Account: The user account may have expired or been locked.
  
  Solutions:
  
  Verify Credentials: Ensure that the username and password are correct. Try logging in directly to the R/2 system