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

SY507 - Overview

• 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