How To Fix AJ429 - Do not suppress temperature calculation when Joule-Thomson effect is used

SAP Error Message - Details

• Message type: E = Error

• Message class: AJ - Billing program

• Message number: 429

• Message text: Do not suppress temperature calculation when Joule-Thomson effect is used

What causes this issue?

If you want to take the Joule-Thomson effect into account, you cannot
suppress the calculation of the temperature.
In this case, you cannot select the <LS>Without temperature</> field.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

INCLUDE ISU_KORR OBJECT DOKU ID TX

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AJ429 - Do not suppress temperature calculation when Joule-Thomson effect is used ?

  The SAP error message AJ429, "Do not suppress temperature calculation when Joule-Thomson effect is used," typically arises in the context of process engineering or chemical engineering applications within SAP, particularly when dealing with thermodynamic calculations.
  Cause:
  This error message indicates that the system is attempting to suppress the temperature calculation while the Joule-Thomson effect is being considered. The Joule-Thomson effect describes the change in temperature of a real gas when it is allowed to expand freely at constant enthalpy. In scenarios where this effect is relevant, the temperature must be calculated accurately to ensure that the thermodynamic properties are correctly represented.
  Solution:
  To resolve this error, you should ensure that the temperature calculation is not suppressed when the Joule-Thomson effect is being utilized. Here are some steps you can take:
  
  
  Check Configuration Settings: Review the configuration settings in your SAP system related to thermodynamic calculations. Ensure that the settings allow for temperature calculations when the Joule-Thomson effect is applicable.
  
  
  Review Process Parameters: Verify the parameters of the process or the material being modeled. Ensure that the conditions under which the Joule-Thomson effect is relevant are correctly defined.
  
  
  Update Calculation Methods: If you are using custom calculation methods or user-defined functions, ensure that they are correctly implemented to handle the Joule-Thomson effect without suppressing temperature calculations.
  
  
  Consult Documentation: Refer to SAP documentation or help resources specific to the module you are using (e.g., SAP PPM, SAP EHS) for guidance on handling thermodynamic calculations and the Joule-Thomson effect.
  
  
  Contact Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for further assistance. They may provide insights specific to your system configuration or version.
  
  
  Related Information:
  
  Joule-Thomson Effect: Understanding the Joule-Thomson effect is crucial for accurate thermodynamic modeling. It is important in processes involving gases, especially in refrigeration and gas processing industries.
  Thermodynamic Calculations in SAP: Familiarize yourself with how SAP handles thermodynamic calculations, including the relevant modules and transaction codes.
  SAP Notes and Knowledge Base: Check for any SAP Notes related to error AJ429 or thermodynamic calculations that may provide additional context or solutions.
  
  By following these steps, you should be able to address the error and ensure that your temperature calculations are performed correctly in the context of the Joule-Thomson effect.