How To Fix SY507 - User switch is not possible (SY-SUBRC = &)

SAP Error Message - Details

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 507

• Message text: User switch is not possible (SY-SUBRC = &)

What causes this issue?

Asynchronous transactional RFCs (tRFC/qRFC inbound and outbound) can
only be started in the ABAP systems in which they were created.
Units which were created on ABAP system A and then copied to ABAP system
B can no longer be executed. This problem may occur when copying systems
with database resources.

How to fix this error?

The LUWs which can no longer be executed must be deleted.

Procedure for System Administrators

You can delete them by using the monitor program of the tRFC (SM58),
qRFC outbound (SMQ1), and qRFC inbound (SMQ2) monitors.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SY507 - User switch is not possible (SY-SUBRC = &) ?

  The SAP error message SY507: User switch is not possible (SY-SUBRC = &) typically occurs when there is an attempt to switch users in a session, but the system is unable to perform the switch due to certain conditions not being met. This error is often related to authorization issues or session management.
  Causes:
  
  Authorization Issues: The user attempting to switch may not have the necessary authorizations to perform a user switch.
  Session State: The current session may not be in a state that allows for a user switch. For example, if there are unsaved changes or if the session is locked.
  Technical Restrictions: Certain technical restrictions may prevent user switching, such as system settings or configurations that disallow user switches.
  User Type: The user type (dialog, background, etc.) may not support switching.
  Incorrect User ID: The user ID being switched to may not exist or may be inactive.
  
  Solutions:
  
  Check Authorizations: Ensure that the user has the necessary authorizations to perform a user switch. This can be done by reviewing the user's roles and authorizations in the SAP system.
  Session Management: Make sure that the current session is in a valid state for switching. Save any changes and ensure that the session is not locked.
  Review System Settings: Check the system configuration to see if there are any settings that restrict user switching. This may involve consulting with your SAP Basis team.
  Validate User ID: Ensure that the user ID you are trying to switch to is valid, active, and has the necessary permissions.
  Use Transaction Codes: If applicable, use transaction codes like SU01 (User Maintenance) to check user details and authorizations.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to user switching. You can search the SAP Support Portal for relevant notes.
  Transaction SU53: After encountering the error, you can use transaction SU53 to analyze authorization issues. This transaction shows the last authorization check and can help identify missing authorizations.
  User Management: Familiarize yourself with user management in SAP, including roles, profiles, and authorizations, to better understand how user switching works.
  
  If the issue persists after checking the above points, it may be beneficial to consult with your SAP Basis or security team for further investigation.