Description
This error occurs when one or more comparison values are invalid or missing. Each comparison value must be a positive number between 1/9 and 9. The error also occurs if no comparison values are provided.
Solution
Ensure that all comparison values are entered within the specified range of 1/9 to 9. Values outside this range are not allowed and should be adjusted accordingly.
Ensure the comparison matrix follows the required format as specified in the documentation.