[#0] WARNING:InputArguments -- The parameter 'sigmax' with range [-inf, inf] of the RooGaussian 'gaussx' exceeds the safe range of (0, inf). Advise to limit its range.
[#1] INFO:NumericIntegration -- RooRealIntegral::init(SPECINT[gaussy_NORM[y]_X_gaussx_NORM[x]]_Int[y]) using numeric integrator RooIntegrator1D to calculate Int(y)
[#1] INFO:Fitting -- RooAbsPdf::fitTo(model_Int[y]_Norm[x,y]_wrapped_pdf) fixing normalization set for coefficient determination to observables in data
[#1] INFO:Fitting -- using generic CPU library compiled with no vectorizations
[#1] INFO:Fitting -- Creation of NLL object took 850.574 μs
[#1] INFO:Fitting -- RooAddition::defaultErrorLevel(nll_model_Int[y]_Norm[x,y]_wrapped_pdf_genData) Summation contains a RooNLLVar, using its error level
[#0] WARNING:Minimization -- RooAbsMinimizerFcn::synchronize: WARNING: no initial error estimate available for a1: using 0.4
[#1] INFO:Minimization -- [fitFCN] No discrete parameters, performing continuous minimization only
[#1] INFO:NumericIntegration -- RooRealIntegral::init(SPECINT[gaussy_NORM[y]_X_gaussx_NORM[x]]_Int[y]) using numeric integrator RooIntegrator1D to calculate Int(y)

prevFCN = 1900.156536  a1=-1.488, 
prevFCN = 1899.96972  a1=-1.512, 
prevFCN = 1900.566064  a1=-1.499, 
prevFCN = 1900.127678  a1=-1.501, 
prevFCN = 1900.187622  a1=-1.484, 
prevFCN = 1899.958651  a1=-1.483, 
prevFCN = 1899.959674  a1=-1.484, 
prevFCN = 1899.958586  a1=-1.484, 
prevFCN = 1899.958651  a1=-1.483, 
prevFCN = 1899.959674  a1=-1.484, 
prevFCN = 1899.958586  a1=-1.483, 
prevFCN = 1899.958779  a1=-1.484, 
prevFCN = 1899.958562  a1=-1.484, 
prevFCN = 1899.958651  a1=-1.483, 
prevFCN = 1899.958779  a1=-1.484, 
prevFCN = 1899.958562  a1=-1.484, 
prevFCN = 1899.958674  a1=-1.484, 
prevFCN = 1899.95863  a1=-1.484, [#1] INFO:NumericIntegration -- RooRealIntegral::init(SPECINT[gaussy_NORM[y]_X_gaussx_NORM[x]]_Int[y]) using numeric integrator RooIntegrator1D to calculate Int(y)