UTR Library Designer Error

Template 5'-UTR Sequence (25NT) : NNNNNNNNNNNAAGGAGNNNNNNNN ,     Additional Constraints for designing 5'-UTR sequence (25NT) : NNNNNNNNNNNNNNNNNNNNNNNNN

Protein Coding Sequence (at least N-term 35NT) : ATGAGCGCCACCACCGGCGCACGCAGTGCATCGGT

16s rRNA Sequence : ACCUCCUUA

Desired Expression Range : 2002000.55 ~ 102672.55 ( Desired max expression should be larger than that of min )

Number of expression-level intermediates : 64