How To Fix VO728 - Unexpected return code APPL_LOG_WRITE_HEADER: &

SAP Error Message - Details

• Message type: E = Error

• Message class: VO - W&S: Rough workload forecast + picking wave

• Message number: 728

• Message text: Unexpected return code APPL_LOG_WRITE_HEADER: &

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message VO728 - Unexpected return code APPL_LOG_WRITE_HEADER: & ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  VO728 Unexpected return code APPL_LOG_WRITE_HEADER: &
  
  1. Cause
  The error message VO728 with the text "Unexpected return code APPL_LOG_WRITE_HEADER: &" typically occurs when there is a problem writing the application log header in SAP. The placeholder & is replaced by a return code indicating the specific issue encountered during the log write operation.
  Common causes include:
  
  Authorization issues: The user or process does not have sufficient authorization to write to the application log.
  Application log object or subobject missing or incorrectly configured: The log object or subobject used in the application log does not exist or is not properly maintained.
  Database or system issues: Problems with the database or system resources that prevent writing to the log.
  Incorrect parameters or corrupted log data: The data passed to the logging function module is invalid or corrupted.
  Transport or system inconsistencies: If the application log object was transported incorrectly or inconsistently between systems.
  
  
  2. Solution
  To resolve the error, consider the following steps:
  
  
  Check the return code:
  
  The message includes a return code (replacing the &). Identify this code to understand the specific problem. For example, return codes like 1, 2, or 3 have specific meanings in the context of application log writing.
  
  
  Verify application log object and subobject:
  
  Use transaction SLG0 to check if the application log object and subobject exist and are correctly configured.
  
  
  Check authorizations:
  
  Ensure the user or background job has the necessary authorizations to write application logs. Relevant authorization objects include S_LOG.
  
  
  Check system and database status:
  
  Verify that the database is functioning correctly and that there are no system resource issues.
  
  
  Review the program or function module call:
  
  If the error occurs in a custom program or enhancement, check the parameters passed to the function module APPL_LOG_WRITE_HEADER or related logging function modules.
  
  
  Recreate or repair the application log object:
  
  If the log object is corrupted, consider recreating it or transporting it again from the development system.
  
  
  Check SAP Notes:
  
  Search for SAP Notes related to the error message VO728 or the specific return code for known bugs or patches.
  
  
  
  3. Related Information
  
  
  Function Modules involved:  
  
  APPL_LOG_WRITE_HEADER  
  BAL_LOG_CREATE  
  BAL_LOG_MSG_ADD  
  BAL_DB_SAVE
  
  
  
  Transactions:  
  
  SLG0 - Application Log: Define Object  
  SLG1 - Application Log: Display Logs  
  SLG2 - Application Log: Delete Logs
  
  
  
  SAP Notes:
  
  Check SAP Support Portal for notes related to VO728 or application log issues.
  
  
  Documentation:
  
  SAP Help Portal documentation on Application Logs and the use of function modules for logging.
  
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  VO728 Unexpected return code APPL_LOG_WRITE_HEADER: &
  
  
  Cause
  Problem writing application log header due to authorization, configuration, or system issues
  
  
  Solution
  Check return code, verify log object/subobject, check authorizations, system status, and parameters
  
  
  Related Tcodes
  SLG0, SLG1, SLG2
  
  
  Function Modules
  APPL_LOG_WRITE_HEADER, BAL_LOG_CREATE, BAL_LOG_MSG_ADD, BAL_DB_SAVE
  
  
  
  
  If you provide the exact return code replacing the &, I can help interpret it more precisely.