Dear Bruce,

I am new in the list and really don’t know if the points raised below were already discussed.

In the (D)Artemis (Demeter version 0.9.13) how may I:

- Plot different fits with the experimental data (to visually compare the results)

- I don’t know if this is a (new) bug of the program but when I try to restore a fit the program closes. In the log file the following line is written: “Can't use an undefined value as a HASH reference at C:/Strawberry/perl/site/lib/Demeter/Fit.pm line 1558.”

Obs.:  I am running Demeter in Windows 7 (Pro).

Another problem is related to the statistical errors when constraining the S0^2 parameter to float between two limits.  The program doesn’t return the error for all others parameters (but just zero as the error value) as you can see below:

guess parameters:                                                               

  amp                =   0.79284158    # +/-   0.00000000     [0.95]

  enot               =   5.29826510    # +/-   0.00000000     [0]

  delrIn11           =   0.00235278    # +/-   0.00000000     [0]

  ssIn11             =   0.00155959    # +/-   0.00000000     [0.00300]

  delrCe1            =  -0.00231455    # +/-   0.00000000     [0]

  ssCe1              =   0.00192778    # +/-   0.00000000     [0.00300]

  delrIn11In11       =   0.02070081    # +/-   0.00000000     [0]

  delrIr1            =  -0.00435502    # +/-   0.00000000     [0]

  ssIr1              =   0.00386517    # +/-   0.00000000     [0.00300]

  delrIn31           =   0.00648507    # +/-   0.00000000     [0]

  ssIn31             =   0.00669602    # +/-   0.00000000     [0.00300]

  delrIn12           =   0.00255704    # +/-   0.00000000     [0]

  ssIn12             =   0.00305432    # +/-   0.00000000     [0.00300]

def parameters:                                                                

  b                  =   0.80000000    # [min(max(0.8,amp),1.0)]

Thanks so much in advance.

Nilmar