Execution Time1.84s

Test: tutorial-roofit-rf403_weightedevts (Passed)
Build: PR-4624-i686-ubuntu18-gcc7-opt (sft-ubuntu-1804-i386-2) on 2019-11-14 21:02:05
Repository revision: dfb00e27dc8e66d7a36bd3789ae6ae978a535876

Test Timing: Passed
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Test output
Processing /home/sftnight/build/workspace/root-pullrequests-build/root/tutorials/roofit/rf403_weightedevts.C...

[NON-XML-CHAR-0x1B][1mRooFit v3.60 -- Developed by Wouter Verkerke and David Kirkby[NON-XML-CHAR-0x1B][0m 
                Copyright (C) 2000-2013 NIKHEF, University of California & Stanford University
                All rights reserved, please read http://roofit.sourceforge.net/license.txt

RooDataSet::pxData[x,w] = 1000 entries
RooDataSet::pxData[x,weight:w] = 1000 entries (43238.9 weighted)
[#0] WARNING:InputArguments -- RooAbsPdf::fitTo(p2) WARNING: a likelihood fit is requested of what appears to be weighted data.
       While the estimated values of the parameters will always be calculated taking the weights into account,
       there are multiple ways to estimate the errors of the parameters. You are advised to make an'n       explicit choice for the error calculation:
           - Either provide SumW2Error(true), to calculate a sum-of-weights-corrected HESSE error matrix
             (error will be proportional to the number of events in MC).
           - Or provide SumW2Error(false), to return errors from original HESSE error matrix
             (which will be proportional to the sum of the weights, i.e., a dataset with <sum of weights> events).
       If you want the errors to reflect the information contained in the provided simulation, choose true.
       If you want the errors to reflect the precision you would be able to obtain with an unweighted dataset
       with <sum of weights> events, choose false.
[#1] INFO:Minization -- RooMinimizer::optimizeConst: activating const optimization
[#0] WARNING:Optimization -- RooAbsOptTestStatistic::optimizeConstantTerms(nll_p2_pxData) WARNING Cache-and-track optimization (Optimize level 2) is only available for datasets implement in terms of RooVectorDataStore - ignoring this option for current dataset
 **********
 **    1 **SET PRINT           1
 **********
 **********
 **    2 **SET NOGRAD
 **********
 PARAMETER DEFINITIONS:
    NO.   NAME         VALUE      STEP SIZE      LIMITS
     1 a1           0.00000e+00  2.00000e-01   -1.00000e+00  1.00000e+00
     2 a2           1.00000e+00  5.00000e-01    0.00000e+00  1.00000e+01
 **********
 **    3 **SET ERR         0.5
 **********
 **********
 **    4 **SET PRINT           1
 **********
 **********
 **    5 **SET STR           1
 **********
 NOW USING STRATEGY  1: TRY TO BALANCE SPEED AGAINST RELIABILITY
 **********
 **    6 **MIGRAD        1000           1
 **********
 FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
 START MIGRAD MINIMIZATION.  STRATEGY  1.  CONVERGENCE WHEN EDM .LT. 1.00e-03
 FCN=119822 FROM MIGRAD    STATUS=INITIATE       25 CALLS          26 TOTAL
                     EDM= unknown      STRATEGY= 1      NO ERROR MATRIX       
  EXT PARAMETER               CURRENT GUESS       STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1           0.00000e+00   2.00000e-01   0.00000e+00   1.68737e+02
   2  a2           1.52215e-01   5.00000e-01  -3.96120e-01   4.87454e+03
                               ERR DEF= 0.5
 MIGRAD MINIMIZATION HAS CONVERGED.
 MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=119682 FROM MIGRAD    STATUS=CONVERGED      63 CALLS          64 TOTAL
                     EDM=1.29222e-07    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                   STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1          -4.85603e-03   4.03455e-03   9.64266e-04  -8.28728e-02
   2  a2           9.86514e-02   2.41306e-03   5.83664e-04  -5.42318e-02
                               ERR DEF= 0.5
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=0.5
  1.628e-05 -1.173e-08 
 -1.173e-08  5.823e-06 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2
        1  0.00120   1.000 -0.001
        2  0.00120  -0.001  1.000
 **********
 **    7 **SET ERR         0.5
 **********
 **********
 **    8 **SET PRINT           1
 **********
 **********
 **    9 **HESSE        1000
 **********
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=119682 FROM HESSE     STATUS=OK             10 CALLS          74 TOTAL
                     EDM=1.28662e-07    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                INTERNAL      INTERNAL  
  NO.   NAME      VALUE            ERROR       STEP SIZE       VALUE   
   1  a1          -4.85603e-03   4.03459e-03   1.92853e-04  -4.85605e-03
   2  a2           9.86514e-02   2.41310e-03   2.33465e-05  -1.37182e+00
                               ERR DEF= 0.5
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=0.5
  1.628e-05 -4.575e-08 
 -4.575e-08  5.823e-06 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2
        1  0.00470   1.000 -0.005
        2  0.00470  -0.005  1.000
[#1] INFO:Minization -- RooMinimizer::optimizeConst: deactivating const optimization
[#1] INFO:Minization -- RooMinimizer::optimizeConst: activating const optimization
[#0] WARNING:Optimization -- RooAbsOptTestStatistic::optimizeConstantTerms(nll_p2_pxData) WARNING Cache-and-track optimization (Optimize level 2) is only available for datasets implement in terms of RooVectorDataStore - ignoring this option for current dataset
 **********
 **   10 **SET PRINT           1
 **********
 **********
 **   11 **SET NOGRAD
 **********
 PARAMETER DEFINITIONS:
    NO.   NAME         VALUE      STEP SIZE      LIMITS
     1 a1          -4.85603e-03  4.03459e-03   -1.00000e+00  1.00000e+00
     2 a2           9.86514e-02  2.41310e-03    0.00000e+00  1.00000e+01
 **********
 **   12 **SET ERR         0.5
 **********
 **********
 **   13 **SET PRINT           1
 **********
 **********
 **   14 **SET STR           1
 **********
 NOW USING STRATEGY  1: TRY TO BALANCE SPEED AGAINST RELIABILITY
 **********
 **   15 **MIGRAD        1000           1
 **********
 FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
 START MIGRAD MINIMIZATION.  STRATEGY  1.  CONVERGENCE WHEN EDM .LT. 1.00e-03
 FCN=119682 FROM MIGRAD    STATUS=INITIATE        4 CALLS           5 TOTAL
                     EDM= unknown      STRATEGY= 1      NO ERROR MATRIX       
  EXT PARAMETER               CURRENT GUESS       STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1          -4.85603e-03   4.03459e-03   4.03465e-03  -8.32948e-02
   2  a2           9.86514e-02   2.41310e-03   2.44179e-03  -2.65748e-01
                               ERR DEF= 0.5
 MIGRAD MINIMIZATION HAS CONVERGED.
 MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=119682 FROM MIGRAD    STATUS=CONVERGED      23 CALLS          24 TOTAL
                     EDM=5.53437e-08    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                   STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1          -4.85553e-03   4.03456e-03   9.63830e-04  -5.18346e-02
   2  a2           9.86520e-02   2.41308e-03   5.83268e-04   4.40227e-02
                               ERR DEF= 0.5
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=0.5
  1.628e-05 -1.171e-08 
 -1.171e-08  5.823e-06 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2
        1  0.00120   1.000 -0.001
        2  0.00120  -0.001  1.000
 **********
 **   16 **SET ERR         0.5
 **********
 **********
 **   17 **SET PRINT           1
 **********
 **********
 **   18 **HESSE        1000
 **********
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=119682 FROM HESSE     STATUS=OK             10 CALLS          34 TOTAL
                     EDM=5.56466e-08    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                INTERNAL      INTERNAL  
  NO.   NAME      VALUE            ERROR       STEP SIZE       VALUE   
   1  a1          -4.85553e-03   4.03461e-03   1.92766e-04  -4.85555e-03
   2  a2           9.86520e-02   2.41312e-03   2.33307e-05  -1.37182e+00
                               ERR DEF= 0.5
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=0.5
  1.628e-05 -4.571e-08 
 -4.571e-08  5.823e-06 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2
        1  0.00470   1.000 -0.005
        2  0.00470  -0.005  1.000
[#1] INFO:Fitting -- RooAbsPdf::fitTo(p2) Calculating sum-of-weights-squared correction matrix for covariance matrix
 **********
 **   19 **SET ERR         0.5
 **********
 **********
 **   20 **SET PRINT           1
 **********
 **********
 **   21 **HESSE        1000
 **********
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=6.84247e+06 FROM HESSE     STATUS=OK             14 CALLS          48 TOTAL
                     EDM=158914    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                INTERNAL      INTERNAL  
  NO.   NAME      VALUE            ERROR       STEP SIZE       VALUE   
   1  a1          -4.85553e-03   5.43362e-04   3.93243e-03  -4.85555e-03
   2  a2           9.86520e-02   1.95133e-04   4.75947e-04  -1.37182e+00
                               ERR DEF= 0.5
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=0.5
  2.952e-07  6.228e-09 
  6.228e-09  3.808e-08 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2
        1  0.05874   1.000  0.059
        2  0.05874   0.059  1.000
[#1] INFO:Minization -- RooMinimizer::optimizeConst: deactivating const optimization
[#1] INFO:NumericIntegration -- RooRealIntegral::init(genPdf_Int[x]) using numeric integrator RooIntegrator1D to calculate Int(x)
[#1] INFO:NumericIntegration -- RooRealIntegral::init(genPdf_Int[x]) using numeric integrator RooIntegrator1D to calculate Int(x)
[#1] INFO:NumericIntegration -- RooRealIntegral::init(genPdf_Int[x]) using numeric integrator RooIntegrator1D to calculate Int(x)
[#1] INFO:NumericIntegration -- RooRealIntegral::init(genPdf_Int[x]) using numeric integrator RooIntegrator1D to calculate Int(x)
[#1] INFO:Minization -- RooMinimizer::optimizeConst: activating const optimization
 **********
 **   22 **SET PRINT           1
 **********
 **********
 **   23 **SET NOGRAD
 **********
 PARAMETER DEFINITIONS:
    NO.   NAME         VALUE      STEP SIZE      LIMITS
     1 a1          -4.85553e-03  3.00247e-02   -1.00000e+00  1.00000e+00
     2 a2           9.86520e-02  2.98987e-02    0.00000e+00  1.00000e+01
 **********
 **   24 **SET ERR         0.5
 **********
 **********
 **   25 **SET PRINT           1
 **********
 **********
 **   26 **SET STR           1
 **********
 NOW USING STRATEGY  1: TRY TO BALANCE SPEED AGAINST RELIABILITY
 **********
 **   27 **MIGRAD        1000           1
 **********
 FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
 START MIGRAD MINIMIZATION.  STRATEGY  1.  CONVERGENCE WHEN EDM .LT. 1.00e-03
 FCN=2766.64 FROM MIGRAD    STATUS=INITIATE        6 CALLS           7 TOTAL
                     EDM= unknown      STRATEGY= 1      NO ERROR MATRIX       
  EXT PARAMETER               CURRENT GUESS       STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1          -4.85553e-03   3.00247e-02   3.00296e-02  -1.97827e+01
   2  a2           9.86520e-02   2.98987e-02   3.06116e-02  -1.19823e+01
                               ERR DEF= 0.5
 MIGRAD MINIMIZATION HAS CONVERGED.
 MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=2766.49 FROM MIGRAD    STATUS=CONVERGED      29 CALLS          30 TOTAL
                     EDM=7.62783e-07    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                   STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1           8.94396e-03   2.69244e-02   9.81558e-04   3.18558e-02
   2  a2           1.01291e-01   1.67455e-02   6.10755e-04  -9.73691e-03
                               ERR DEF= 0.5
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=0.5
  7.251e-04 -6.220e-07 
 -6.220e-07  2.804e-04 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2
        1  0.00138   1.000 -0.001
        2  0.00138  -0.001  1.000
 **********
 **   28 **SET ERR         0.5
 **********
 **********
 **   29 **SET PRINT           1
 **********
 **********
 **   30 **HESSE        1000
 **********
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=2766.49 FROM HESSE     STATUS=OK             10 CALLS          40 TOTAL
                     EDM=7.63714e-07    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                INTERNAL      INTERNAL  
  NO.   NAME      VALUE            ERROR       STEP SIZE       VALUE   
   1  a1           8.94396e-03   2.69247e-02   1.96312e-04   8.94408e-03
   2  a2           1.01291e-01   1.67458e-02   2.44302e-05  -1.36917e+00
                               ERR DEF= 0.5
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=0.5
  7.251e-04 -2.218e-06 
 -2.218e-06  2.804e-04 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2
        1  0.00492   1.000 -0.005
        2  0.00492  -0.005  1.000
[#1] INFO:Minization -- RooMinimizer::optimizeConst: deactivating const optimization
[#1] INFO:Minization -- RooMinimizer::optimizeConst: activating const optimization
 **********
 **   31 **SET PRINT           1
 **********
 **********
 **   32 **SET NOGRAD
 **********
 PARAMETER DEFINITIONS:
    NO.   NAME         VALUE      STEP SIZE      LIMITS
     1 a1           8.94396e-03  2.69247e-02   -1.00000e+00  1.00000e+00
     2 a2           1.01291e-01  1.67458e-02    0.00000e+00  1.00000e+01
 **********
 **   33 **SET ERR         0.5
 **********
 **********
 **   34 **SET PRINT           1
 **********
 **********
 **   35 **SET STR           1
 **********
 NOW USING STRATEGY  1: TRY TO BALANCE SPEED AGAINST RELIABILITY
 **********
 **   36 **MIGRAD        1000           1
 **********
 FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
 START MIGRAD MINIMIZATION.  STRATEGY  1.  CONVERGENCE WHEN EDM .LT. 1.00e-03
 FCN=118896 FROM MIGRAD    STATUS=INITIATE        8 CALLS           9 TOTAL
                     EDM= unknown      STRATEGY= 1      NO ERROR MATRIX       
  EXT PARAMETER               CURRENT GUESS       STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1           8.94396e-03   2.69247e-02   2.69290e-02   5.93783e+02
   2  a2           1.01291e-01   1.67458e-02   1.67812e-02   5.89498e+02
                               ERR DEF= 0.5
 MIGRAD MINIMIZATION HAS CONVERGED.
 MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=118892 FROM MIGRAD    STATUS=CONVERGED      30 CALLS          31 TOTAL
                     EDM=2.21121e-06    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                   STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1          -1.13263e-03   4.02053e-03   9.57731e-04   8.59142e-02
   2  a2           9.75516e-02   2.36606e-03   5.73586e-04  -5.99867e-01
                               ERR DEF= 0.5
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=0.5
  1.616e-05 -6.207e-08 
 -6.207e-08  5.598e-06 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2
        1  0.00652   1.000 -0.007
        2  0.00652  -0.007  1.000
 **********
 **   37 **SET ERR         0.5
 **********
 **********
 **   38 **SET PRINT           1
 **********
 **********
 **   39 **HESSE        1000
 **********
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=118892 FROM HESSE     STATUS=OK             10 CALLS          41 TOTAL
                     EDM=2.21254e-06    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                INTERNAL      INTERNAL  
  NO.   NAME      VALUE            ERROR       STEP SIZE       VALUE   
   1  a1          -1.13263e-03   4.02065e-03   1.91546e-04  -1.13263e-03
   2  a2           9.75516e-02   2.36614e-03   2.29434e-05  -1.37294e+00
                               ERR DEF= 0.5
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=0.5
  1.617e-05 -9.497e-08 
 -9.497e-08  5.599e-06 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2
        1  0.00998   1.000 -0.010
        2  0.00998  -0.010  1.000
[#1] INFO:Minization -- RooMinimizer::optimizeConst: deactivating const optimization
DataStore pxData_binned (Generated From px_binned)
  Contains 40 entries
  Observables: 
    1)  x = -1.26187  L(-10 - 10) B(40)  "x"
Binned Dataset pxData_binned (Generated From px_binned)
  Contains 40 bins with a total weight of 43238.9
  Observables:     1)  x = -1.26187  L(-10 - 10) B(40)  "x"
 **********
 **   40 **SET PRINT           1
 **********
 **********
 **   41 **SET NOGRAD
 **********
 PARAMETER DEFINITIONS:
    NO.   NAME         VALUE      STEP SIZE      LIMITS
     1 a1          -1.13263e-03  4.02065e-03   -1.00000e+00  1.00000e+00
     2 a2           9.75516e-02  2.36614e-03    0.00000e+00  1.00000e+01
 **********
 **   42 **SET ERR           1
 **********
 **********
 **   43 **SET PRINT           1
 **********
 **********
 **   44 **SET STR           1
 **********
 NOW USING STRATEGY  1: TRY TO BALANCE SPEED AGAINST RELIABILITY
 **********
 **   45 **MIGRAD        1000           1
 **********
 FIRST CALL TO USER FUNCTION AT NEW START POINT, WITH IFLAG=4.
 START MIGRAD MINIMIZATION.  STRATEGY  1.  CONVERGENCE WHEN EDM .LT. 1.00e-03
 FCN=32.3464 FROM MIGRAD    STATUS=INITIATE        6 CALLS           7 TOTAL
                     EDM= unknown      STRATEGY= 1      NO ERROR MATRIX       
  EXT PARAMETER               CURRENT GUESS       STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1          -1.13263e-03   4.02065e-03   4.02066e-03   2.74413e+01
   2  a2           9.75516e-02   2.36614e-03   2.40760e-03  -2.04371e+02
 MIGRAD MINIMIZATION HAS CONVERGED.
 MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=31.3747 FROM MIGRAD    STATUS=CONVERGED      28 CALLS          29 TOTAL
                     EDM=8.52339e-08    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                   STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1          -9.98900e-03   2.62975e-02   7.27538e-05   4.94399e-03
   2  a2           1.06373e-01   1.01849e-02   2.73457e-05  -3.91519e-02
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=1
  6.917e-04 -6.529e-06 
 -6.529e-06  1.037e-04 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2
        1  0.02437   1.000 -0.024
        2  0.02437  -0.024  1.000
 **********
 **   46 **SET ERR           1
 **********
 **********
 **   47 **SET PRINT           1
 **********
 **********
 **   48 **HESSE        1000
 **********
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=31.3747 FROM HESSE     STATUS=OK             10 CALLS          39 TOTAL
                     EDM=8.52317e-08    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                INTERNAL      INTERNAL  
  NO.   NAME      VALUE            ERROR       STEP SIZE       VALUE   
   1  a1          -9.98900e-03   2.62976e-02   1.45508e-05  -9.98917e-03
   2  a2           1.06373e-01   1.01850e-02   5.46914e-06  -1.36415e+00
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  2    ERR DEF=1
  6.917e-04 -6.575e-06 
 -6.575e-06  1.037e-04 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2
        1  0.02455   1.000 -0.025
        2  0.02455  -0.025  1.000
==> ML Fit results on 1K unweighted events

  RooFitResult: minimized FCN value: 2766.49, estimated distance to minimum: 7.63714e-07
                covariance matrix quality: Full, accurate covariance matrix
                Status : MINIMIZE=0 HESSE=0 

    Floating Parameter    FinalValue +/-  Error   
  --------------------  --------------------------
                    a1    8.9440e-03 +/-  2.69e-02
                    a2    1.0129e-01 +/-  1.67e-02

==> ML Fit results on 43K unweighted events

  RooFitResult: minimized FCN value: 118892, estimated distance to minimum: 2.21254e-06
                covariance matrix quality: Full, accurate covariance matrix
                Status : MINIMIZE=0 HESSE=0 

    Floating Parameter    FinalValue +/-  Error   
  --------------------  --------------------------
                    a1   -1.1326e-03 +/-  4.02e-03
                    a2    9.7552e-02 +/-  2.37e-03

==> ML Fit results on 1K weighted events with a summed weight of 43K

  RooFitResult: minimized FCN value: 119682, estimated distance to minimum: 1.28662e-07
                covariance matrix quality: Full, accurate covariance matrix
                Status : MINIMIZE=0 HESSE=0 

    Floating Parameter    FinalValue +/-  Error   
  --------------------  --------------------------
                    a1   -4.8560e-03 +/-  4.03e-03
                    a2    9.8651e-02 +/-  2.41e-03

==> Corrected ML Fit results on 1K weighted events with a summed weight of 43K

  RooFitResult: minimized FCN value: 6.84247e+06, estimated distance to minimum: 158914
                covariance matrix quality: Unknown, matrix was externally provided
                Status : MINIMIZE=0 HESSE=0 HESSE=0 

    Floating Parameter    FinalValue +/-  Error   
  --------------------  --------------------------
                    a1   -4.8555e-03 +/-  3.00e-02
                    a2    9.8652e-02 +/-  2.99e-02

==> Chi2 Fit results on 1K weighted events with a summed weight of 43K

  RooFitResult: minimized FCN value: 31.3747, estimated distance to minimum: 8.52317e-08
                covariance matrix quality: Full, accurate covariance matrix
                Status : MIGRAD=0 HESSE=0 

    Floating Parameter    FinalValue +/-  Error   
  --------------------  --------------------------
                    a1   -9.9890e-03 +/-  2.63e-02
                    a2    1.0637e-01 +/-  1.02e-02