UTR Library Designer Error

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

Protein Coding Sequence (at least N-term 35NT) : ATG ( Length should be more than 35NT )

16s rRNA Sequence : ACCUCCUUA

Desired Expression Range : 1000000.00 ~ 102672.55 ( Desired max expression should be larger than that of min )

Number of expression-level intermediates : 16