Hi George, 

Very sorry, that should have been

 delta_fit = 0.0*result.best_fit

It's now fixed in github master, and I verified that I could actually export a model from pre-edge peak fitting in XAS_Viewer.

On Wed, Apr 29, 2020 at 10:31 AM George Sterbinsky <GeorgeSterbinsky@u.northwestern.edu> wrote:

Hi Matt and all,

Unfortunately, after a clean install of larch following the source installation instructions, I am not able export any fits to xdi files, and a different error, shown below, is now printed in the terminal. Please let me know if any additional information would be helpful in solving this issue.

Thank you,

George

Traceback (most recent call last):
  File "/opt/anaconda3/lib/python3.7/site-packages/xraylarch-0.9.47-py3.7.egg/larch/wxxas/prepeak_panel.py", line 366, in onExportFitResult
    yerr=yerr, x=x)
  File "/opt/anaconda3/lib/python3.7/site-packages/xraylarch-0.9.47-py3.7.egg/larch/io/export_modelresult.py", line 59, in export_modelresult
    delta_fit = 0.0*result_best_fit
NameError: name 'result_best_fit' is not defined

On Tue, Apr 21, 2020 at 9:25 AM Matt Newville <newville@cars.uchicago.edu> wrote:

Hi George,

Hm, sorry about that.  It seems to be saying that the parameter uncertainties weren't calculated correctly.  It probably should not even be trying to estimate the uncertainty in the model.  I believe it should be fixed in git master for larch, and I'll see about looking for this in lmfit too.

On Mon, Apr 20, 2020 at 4:00 PM George Sterbinsky <GeorgeSterbinsky@u.northwestern.edu> wrote:

Hello,

When attempting to export an xdi file for a pre-edge peak fit in XAS viewer, the error message below prints to the terminal and the xdi file is not generated. I can provide the project file and instructions for generating the error message if that would be helpful.

Thank you,

George

Traceback (most recent call last):
  File "/anaconda3/lib/python3.7/site-packages/larch/wxxas/prepeak_panel.py", line 369, in onExportFitResult
    yerr=yerr, x=x)
  File "/anaconda3/lib/python3.7/site-packages/larch/io/export_modelresult.py", line 60, in export_modelresult
    delta_fit = result.eval_uncertainty(result.params, **kwargs)
  File "/anaconda3/lib/python3.7/site-packages/lmfit/model.py", line 1488, in eval_uncertainty
    dval = pars[pname].stderr/3.0
TypeError: unsupported operand type(s) for /: 'NoneType' and 'float'

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