Hello,

in performing a fit I obtain that for one of the parameter the first derivative is **at limit**.

EXT PARAMETER STEP FIRST

NO. NAME VALUE ERROR SIZE DERIVATIVE

1 h1 1.09812e+02 3.60116e+00 2.30786e-03 -2.08599e-05

2 c1 1.86486e-02 fixed

3 s1 4.80290e-01 1.49304e-02 1.13552e-04 -6.63830e-05

4 h2 3.05939e+01 2.36242e+00 3.03778e-05 1.14984e-03

5 c2 1.64865e+00 fixed

6 s2 4.49226e-01 3.98833e-02 5.75048e-05 1.06085e-04

7 h3 7.38107e+00 1.92092e+00 4.02794e-05 2.75496e-03

8 c3 2.60808e+00 1.88809e-01 2.27532e-04 7.92311e-04

9 s3 5.72634e-01 1.08479e-01 9.98010e-04** at limit **

What does mean this result in term of the fit? Are the values obtained meaningful? How can I solve this problem?

Thanks in advance

Maria

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