How To Fix WFF_FORM_SERVER404 - Internal error: CL_WFF_FORM_DATA_XML invalid (set message)

SAP Error Message - Details

• Message type: E = Error

• Message class: WFF_FORM_SERVER - Web Financials Forms: Form Server

• Message number: 404

• Message text: Internal error: CL_WFF_FORM_DATA_XML invalid (set message)

Self-Explanatory Message

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• What is the cause and solution for SAP error message WFF_FORM_SERVER404 - Internal error: CL_WFF_FORM_DATA_XML invalid (set message) ?

  The SAP error message:
  WFF_FORM_SERVER404 Internal error: CL_WFF_FORM_DATA_XML invalid (set message)
  typically occurs in the context of SAP Workflow Forms (WFF) when the system is unable to properly process or find the form data XML class CL_WFF_FORM_DATA_XML. This error indicates an internal issue related to the workflow form processing, often due to missing or inconsistent form data or configuration.
  
  Cause
  
  
  Missing or Inconsistent Form Data XML Class
  
  The class CL_WFF_FORM_DATA_XML is responsible for handling the XML data of workflow forms. If this class is invalid, missing, or corrupted, the workflow form processing fails.
  
  
  Transport or Upgrade Issues
  
  Sometimes, after system upgrades, patches, or transports, the relevant classes or objects may not be properly updated or activated, leading to this error.
  
  
  Incorrect or Missing Workflow Form Configuration
  
  The workflow form might be incorrectly configured or the form definition might be missing or inconsistent in the system.
  
  
  Authorization Issues
  
  Insufficient authorizations to access or execute the class or related objects can cause this error.
  
  
  System Inconsistencies or Cache Problems
  
  Sometimes, inconsistencies in the system cache or runtime environment can cause the class to be considered invalid.
  
  
  
  Solution
  
  
  Check and Activate the Class CL_WFF_FORM_DATA_XML  
  
  Go to transaction SE24 (Class Builder).  
  Enter CL_WFF_FORM_DATA_XML and check if the class exists and is active.  
  If inactive, activate the class. If missing, check transport logs or system consistency.
  
  
  
  Reimport or Reapply Relevant Support Packages / Patches  
  
  If the class is missing or corrupted, reapplying the latest support packages or patches related to SAP Workflow or SAP Business Workplace might help.
  
  
  
  Check Workflow Form Configuration  
  
  Verify the workflow form setup in transaction SWF_FORM or the relevant form maintenance transactions.  
  Ensure the form is correctly assigned and the XML data structure is consistent.
  
  
  
  Clear Cache and Restart Services  
  
  Clear the SAP buffer/cache using transaction SMLG or SICF (for ICF services).  
  Restart the relevant services or the SAP application server if necessary.
  
  
  
  Check Authorizations  
  
  Ensure the user executing the workflow has the necessary authorizations to access the class and workflow forms.
  
  
  
  SAP Notes and Support  
  
  Search for SAP Notes related to WFF_FORM_SERVER404 or CL_WFF_FORM_DATA_XML.  
  For example, SAP Note 1234567 (example) might address known issues with this class or workflow form errors.  
  If no public notes are available, consider raising a support ticket with SAP.
  
  
  
  
  Related Information
  
  Transaction SWF_FORM: Used to maintain workflow forms.  
  Transaction SE24: Class Builder to check and activate classes.  
  Transaction SWU3: Workflow Customizing to check workflow configuration.  
  SAP Workflow: The error is related to the SAP Business Workflow component, specifically the form processing part.  
  ICF Services: Workflow forms often rely on ICF services; ensure these are active and properly configured.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WFF_FORM_SERVER404 Internal error: CL_WFF_FORM_DATA_XML invalid (set message)
  
  
  Cause
  Invalid/missing class CL_WFF_FORM_DATA_XML, form configuration issues, or system inconsistencies
  
  
  Solution
  Activate/check class in SE24, verify form config, clear cache, check authorizations, apply SAP Notes
  
  
  Related Tcodes
  SE24, SWF_FORM, SWU3, SICF
  
  
  SAP Component
  SAP Business Workflow (WFF)
  
  
  
  
  If you provide more context (e.g., when the error occurs, system version), I can help narrow down the solution further.