esign is not converging. Number of iterations was 1) Check the resulting filter using freqz. 2) Check the specification

[omidrostaei]

Design is not converging. Number of iterations was
1) Check the resulting filter using freqz.
2) Check the specifications.
3) Filter order may be too large or too small.
4) For multiband filters, try making the transition regions more similar in width.
If err is very small, filter order may be too high

firgr