Fixed Interest Period

A fixed interest period of Debt Tranches or Shareholder Loans of 0 years and a longterm interest rate of 0% can lead to an unintended errors! The interest according to the Debt Tranche or Shareholder Loan is in this case 0% despite a different interest input of for example 4% because in this case, the longterm interest rate of 0% is adopted after the fixed interest period of 0 years.