Why does the I/YR and IRR calculations return error?
These solutions are found using a ‘solve’ algorithm which sometimes fails to find the correct solution. The current value in the I/YR register is used as a starting point or estimate, and if this value is too different from the answer, the algorithm might fail to find a correct solution and return ‘error’. Try providing an estimate or guess by storing an approximate value in the I/YR register before performing the calculation.
