How To Fix BC158 - User &1 may not substitute for user &1

SAP Error Message - Details

• Message type: E = Error

• Message class: BC - Scheduler (calendar)

• Message number: 158

• Message text: User &1 may not substitute for user &1

What causes this issue?

You require a special authorization to change a group appointment that
you have not created yourself. You do not have this authorization.

System Response

The date is not changed.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BC158 - User &1 may not substitute for user &1 ?

  The SAP error message BC158 indicates that a user is attempting to substitute themselves, which is not allowed. The message reads: "User &1 may not substitute for user &1." This typically occurs in the context of workflow or task management within SAP, where substitution is used to delegate tasks from one user to another.
  Cause:
  The error occurs when:
  
  A user tries to set up a substitution for themselves. In SAP, a user cannot substitute themselves because it would create a logical inconsistency in the workflow or task assignment.
  The system is configured to prevent self-substitution for security and process integrity reasons.
  
  Solution:
  To resolve this error, the user should:
  
  Choose a Different User for Substitution: Instead of trying to substitute themselves, the user should select another user who will take over their tasks during their absence.
  Check Substitution Settings: Ensure that the substitution is set up correctly in the SAP system. This can typically be done in the SAP GUI under the transaction code SUC01 (for user substitution).
  Consult with an Administrator: If the user believes they need to set up a substitution for themselves for a valid reason, they should discuss this with their SAP administrator or the person responsible for user management in their organization.
  
  Related Information:
  
  Substitution in SAP: Substitution allows users to delegate their tasks to another user when they are unavailable. This is commonly used in workflows, approvals, and task management.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  SUC01: To manage user substitutions.
  SWI1: To monitor workflow instances.
  
  
  User Roles and Authorizations: Ensure that the user has the necessary roles and authorizations to set up substitutions for other users.
  
  By following these steps, the user should be able to resolve the error and set up the necessary substitutions correctly.