How To Fix HH028 - Parameter not contained in either ONCONFIG file or 'oncheck -pP 1 1'

SAP Error Message - Details

• Message type: E = Error

• Message class: HH - (Long) text for check tool 'infcfgcheck'

• Message number: 028

• Message text: Parameter not contained in either ONCONFIG file or 'oncheck -pP 1 1'

What causes this issue?

The specified ONCONFIG parameter is not contained in either the
ONCONFIG file nor in the output of the command 'oncheck -pP 1 1'.
The current single result is not an error and you do not have to do
anything about it!
Background information/explanation:
The specified ONCONFIG parameter does not yet exist in Informix
versions before 7.xx.

System Response

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message HH028 - Parameter not contained in either ONCONFIG file or 'oncheck -pP 1 1' ?

  The SAP error message HH028 indicates that a specific parameter is not found in the ONCONFIG file or is not recognized by the oncheck command. This error typically occurs in the context of SAP systems that are using IBM Informix as the database management system.
  Cause:
  
  Missing Parameter: The parameter that the system is trying to access is not defined in the ONCONFIG file. This could be due to a misconfiguration or an oversight during the setup.
  Incorrect ONCONFIG File: The ONCONFIG file being referenced may not be the correct one for the current database instance.
  Database Corruption: In some cases, database corruption or issues with the Informix server can lead to parameters not being recognized.
  Version Mismatch: There may be a version mismatch between the SAP application and the Informix database, leading to certain parameters not being recognized.
  
  Solution:
  
  
  Check ONCONFIG File: 
  
  Locate the ONCONFIG file being used by your Informix instance. This file is typically located in the $INFORMIXDIR directory.
  Open the ONCONFIG file and verify that the required parameters are defined. If they are missing, you may need to add them based on the SAP documentation or your system requirements.
  
  
  
  Run oncheck Command:
  
  Execute the command oncheck -pP 1 1 to check the parameters currently recognized by the Informix server. This will help you identify if the parameter is indeed missing or if there is another issue.
  Review the output for any discrepancies or errors.
  
  
  
  Consult Documentation: 
  
  Refer to the SAP and Informix documentation for the specific parameters required for your version and configuration. Ensure that all necessary parameters are included in the ONCONFIG file.
  
  
  
  Database Integrity Check: 
  
  If you suspect database corruption, consider running a database integrity check or restoring from a backup if necessary.
  
  
  
  Update or Patch: 
  
  Ensure that both your SAP application and Informix database are up to date with the latest patches and updates. This can resolve compatibility issues.
  
  
  
  Contact Support: 
  
  If the issue persists after checking the ONCONFIG file and running the necessary commands, consider reaching out to SAP or IBM Informix support for further assistance.
  
  
  
  Related Information:
  
  ONCONFIG File: This is the configuration file for Informix that contains various parameters that control the behavior of the database server.
  Informix Commands: Familiarize yourself with Informix commands such as onstat, oncheck, and dbaccess for managing and troubleshooting the database.
  SAP Notes: Check SAP Notes for any known issues or specific configurations related to your version of SAP and Informix.
  
  By following these steps, you should be able to identify and resolve the HH028 error in your SAP system using Informix.