How To Fix 5C518 - Unknown subapplication

SAP Error Message - Details

• Message type: E = Error

• Message class: 5C - HR: Messages for Switzerland

• Message number: 518

• Message text: Unknown subapplication

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message 5C518 - Unknown subapplication ?

  The SAP error message 5C518 "Unknown subapplication" typically occurs in the context of SAP applications when the system cannot identify or find the specified subapplication that is being referenced in a transaction or process. This can happen for various reasons, including configuration issues, missing components, or incorrect input.
  Causes:
  
  Incorrect Configuration: The subapplication may not be properly configured in the system.
  Missing Components: The necessary components or modules for the subapplication may not be installed or activated.
  Authorization Issues: The user may not have the necessary authorizations to access the subapplication.
  Incorrect Input: The input parameters or data provided may not correspond to any known subapplication.
  System Updates: Recent updates or changes to the system may have affected the availability or configuration of the subapplication.
  
  Solutions:
  
  Check Configuration: Verify that the subapplication is correctly configured in the system. This may involve checking transaction codes, customizing settings, or ensuring that all necessary components are installed.
  Review Authorizations: Ensure that the user has the appropriate authorizations to access the subapplication. This can be done by checking user roles and permissions.
  Validate Input: Double-check the input parameters or data being used to ensure they are correct and correspond to a valid subapplication.
  Consult Documentation: Refer to SAP documentation or help resources to understand the specific requirements and configurations for the subapplication in question.
  System Logs: Check system logs (transaction SLG1) for any additional error messages or warnings that may provide more context about the issue.
  Contact Support: If the issue persists, consider reaching out to SAP support or your internal IT support team for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes that may be associated with the subapplication.
  SAP Notes: Search for SAP Notes related to the error message 5C518 in the SAP Support Portal, as there may be specific patches or updates that address the issue.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to diagnose and resolve the "Unknown subapplication" error in SAP.