How To Fix T1358 - Not possible to use both fix and var. interest in first condition

T1358 - Overview

• Message type: E = Error

• Message class: T1 - Financial instruments

• Message number: 358

• Message text: Not possible to use both fix and var. interest in first condition

What causes this issue?

It is not possible to use both fields <LS>Reference Interest Rate</> and
<LS>Percentage Rate</> for the first interest conditions of a deal.

System Response

The fixed rate is deleted from the first condition.

How to fix this error?

If you want to use both fixed and variable interest rates in the first
interest condition of a deal, use a formula.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

T1358 - Details

• The SAP error message T1358, which states "Not possible to use both fix and var. interest in first condition," typically occurs in the context of financial transactions, particularly when dealing with interest calculations in loans, deposits, or other financial instruments. This error indicates that there is a conflict in the configuration of interest types being used in a particular condition.
  
  Cause:
  The error arises when a financial condition is set up to use both fixed and variable interest rates simultaneously, which is not allowed in SAP. This can happen due to:
  
  Incorrect Configuration: The condition types in the pricing procedure may be incorrectly configured to allow both fixed and variable interest rates.
  Data Entry Errors: During the creation or modification of a financial transaction, the user may have inadvertently selected both interest types.
  Inconsistent Master Data: The master data for the financial instrument may have conflicting settings regarding interest types.
  
  
  Solution:
  To resolve the T1358 error, you