How To Fix SWDP_RUNTIME402 - WDA application cannot be loaded

SAP Error Message - Details

• Message type: E = Error

• Message class: SWDP_RUNTIME - Messages of the Web Dynpro Runtime Environment

• Message number: 402

• Message text: WDA application cannot be loaded

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 SWDP_RUNTIME402 - WDA application cannot be loaded ?

  The SAP error message SWDP_RUNTIME402 indicates that a Web Dynpro Application (WDA) cannot be loaded. This error can occur due to various reasons, and understanding the cause is essential for troubleshooting. Here are some common causes, potential solutions, and related information:
  Causes:
  
  Missing or Incorrect Configuration: The WDA might not be properly configured in the SAP system.
  Authorization Issues: The user may not have the necessary authorizations to access the WDA.
  Transport Issues: If the application was recently transported, there may be issues with the transport itself.
  Backend Issues: Problems with the backend system or services that the WDA relies on can lead to this error.
  Web Server Issues: The web server hosting the WDA might be down or misconfigured.
  Cache Issues: Sometimes, cached data can cause loading issues.
  
  Solutions:
  
  
  Check Configuration:
  
  Ensure that the WDA is correctly configured in the SAP system. You can check this in transaction SE80 or SE11.
  Verify that the application is active and correctly defined.
  
  
  
  Authorization Check:
  
  Use transaction SU53 to check for authorization issues after attempting to access the WDA.
  Ensure that the user has the necessary roles and authorizations to access the application.
  
  
  
  Transport Verification:
  
  If the application was recently transported, check the transport logs for any errors.
  Ensure that all necessary objects were included in the transport.
  
  
  
  Backend System Check:
  
  Verify that the backend services and systems that the WDA depends on are up and running.
  Check for any errors in the backend system logs.
  
  
  
  Web Server Configuration:
  
  Ensure that the web server (e.g., SAP Web Dispatcher, ICM) is properly configured and running.
  Check the web server logs for any errors that might indicate issues with loading the WDA.
  
  
  
  Clear Cache:
  
  Clear the cache in the browser and also in the SAP system. You can do this by using transaction SICF to reset the cache for the WDA.
  In some cases, you may need to clear the cache in the SAP Web Dispatcher or ICM.
  
  
  
  Check for Updates:
  
  Ensure that your SAP system is up to date with the latest patches and updates, as bugs in earlier versions may cause issues.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  SE80: Object Navigator
  SE11: Data Dictionary
  SU53: Authorization Check
  SICF: Maintain Services
  
  
  SAP Notes: Check SAP Notes related to the specific error message for any known issues or fixes.
  Logs: Review the application logs (transaction SLG1) and system logs (transaction SM21) for additional error messages that may provide more context.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP Basis team or SAP support for further assistance.