How To Fix WEBDYNPRO_RT018 - Invalid client (&)

SAP Error Message - Details

• Message type: E = Error

• Message class: WEBDYNPRO_RT - Message class of Web Dynpro runtime

• Message number: 018

• Message text: Invalid client (&)

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WEBDYNPRO_RT018 - Invalid client (&) ?

  SAP Error Message:
  
  WEBDYNPRO_RT018 Invalid client (&)
  
  Cause:
  This error typically occurs in SAP Web Dynpro applications when the client number provided or used in the context is invalid or missing. The placeholder (&) in the message is replaced by the actual client number or an empty value if none is provided.
  Common causes include:
  
  The client number is not set or is empty in the Web Dynpro context or configuration.
  The client number provided does not exist in the SAP system.
  The client number is incorrectly passed or formatted in the application.
  The user session or environment does not have a valid client assigned.
  
  
  Solution:
  
  
  Check Client Number Configuration:
  
  Verify that the client number is correctly set in the Web Dynpro application context or parameters.
  Ensure that the client number is a valid 3-digit number corresponding to an existing client in the SAP system.
  
  
  
  Validate User Session:
  
  Confirm that the user session is correctly established with a valid client.
  If the application is called from an external system or via URL parameters, ensure the client parameter is correctly passed.
  
  
  
  Review Application Code:
  
  Check the Web Dynpro component or application code where the client is read or assigned.
  Add debugging or logging to verify the client value at runtime.
  
  
  
  SAP System Client Settings:
  
  Use transaction SCC4 to check if the client exists and is active.
  If the client is inactive or deleted, either activate it or use a valid client.
  
  
  
  Clear Cache and Restart:
  
  Sometimes, stale cache or session data can cause this error. Clear the Web Dynpro cache or restart the application server if necessary.
  
  
  
  
  Related Information:
  
  Transaction SCC4: Client administration (check client existence and status).
  Web Dynpro Context: The client is often passed as a parameter or stored in the context node; ensure it is correctly handled.
  SAP Notes: Search SAP Support Portal for notes related to WEBDYNPRO_RT018 for any patches or known issues.
  Debugging: Use the Web Dynpro debugger or add breakpoints in the component controller to inspect the client value.
  
  
  Summary:
  The error WEBDYNPRO_RT018 Invalid client (&) indicates that the Web Dynpro application is trying to use an invalid or missing client number. Verify the client number's correctness, ensure it exists and is active in the SAP system, and check the application code and user session for proper client assignment.