How To Fix T8179 - Exch.rate categories &1 and &2 are not defined consistently

SAP Error Message - Details

• Message type: E = Error

• Message class: T8 - Analysis system evaluations

• Message number: 179

• Message text: Exch.rate categories &1 and &2 are not defined consistently

What causes this issue?

The definition of these exchange rate categories in Customizing is not
consistent with the reference currency and the corresponding middle rate
(where applicable).

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?

Enter the same reference currency (or blank) and the same middle rate
(or blank) for the corresponding exchange rate categories.

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 T8179 - Exch.rate categories &1 and &2 are not defined consistently ?

  The SAP error message T8179 indicates that there is an inconsistency in the exchange rate categories defined in the system. This typically occurs when the exchange rate categories for different currencies or currency types are not aligned or defined consistently in the system.
  Cause:
  The error arises when:
  
  Two different exchange rate categories are being compared or used in a transaction, and they do not match.
  The configuration for exchange rate types in the system is incomplete or incorrectly set up.
  There may be a mismatch in the settings for the currencies involved in the transaction.
  
  Solution:
  To resolve the T8179 error, you can follow these steps:
  
  
  Check Exchange Rate Categories:
  
  Go to the transaction code OB08 (Maintain Exchange Rates) and verify the exchange rate categories for the currencies involved.
  Ensure that the exchange rate categories for both currencies are defined and consistent.
  
  
  
  Review Configuration:
  
  Use transaction code OBBS (Define Exchange Rate Types) to check the configuration of exchange rate types.
  Ensure that the exchange rate categories are correctly assigned to the relevant exchange rate types.
  
  
  
  Consistency Check:
  
  Use transaction code OBY6 (Define Exchange Rate Types) to check if the exchange rate categories are consistently defined across all relevant currencies.
  Make sure that the same exchange rate category is used for both currencies in the transaction.
  
  
  
  Adjust Settings:
  
  If you find discrepancies, adjust the settings to ensure that the exchange rate categories are consistent.
  You may need to create or modify exchange rate categories to ensure they align with the requirements of your transactions.
  
  
  
  Test Transactions:
  
  After making the necessary adjustments, test the transactions again to ensure that the error no longer occurs.
  
  
  
  Related Information:
  
  Exchange Rate Types: These are used to define how exchange rates are applied in transactions. Each exchange rate type can have different categories based on the business requirements.
  Currency Configuration: Proper configuration of currencies and their exchange rates is crucial for financial transactions in SAP.
  Documentation: Refer to SAP Help documentation for detailed guidance on configuring exchange rates and categories.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis or Finance team for further investigation, as there may be underlying configuration issues that need to be addressed.