How To Fix KM643 - You cannot select the currency key of the transaction currency

KM643 - Overview

• Message type: E = Error

• Message class: KM - Error messages for Profit Center Accounting

• Message number: 643

• Message text: You cannot select the currency key of the transaction currency

What causes this issue?

You cannot enter the currency key of the transaction currency if no
value fields in the transaction currency are contained in the planning
layout.

How to fix this error?

Delete your entry for the characteristic "Currency key" or add value
fields that use the transaction currency to your planning layout.

Error message extract from SAP system. Copyright SAP SE.

KM643 - Details

• The SAP error message KM643, which states "You cannot select the currency key of the transaction currency," typically occurs in the context of financial transactions or reporting where there is a mismatch or an issue with currency settings. Here’s a breakdown of the potential causes, solutions, and related information for this error:
  Causes:
  
  Currency 
  Configuration Issues: The currency key being selected may not be compatible with the transaction currency defined in the system.
  Transaction Currency Mismatch: The currency key you are trying to select may not be allowed for the specific transaction type or document.
  Master Data Settings: The master data (like customer or vendor records) may not have the correct currency settings.
  Document Type Restrictions: Certain document types may have restrictions on the currencies that can be used.
  Customizing Settings: The system configuration in the customizing settings may not allow the selection of the specified currency.
  
  Solutions:
  
  Check Currency Settings: Verify the currency settings in the relevant