**********
 **    1 **SET ERR           1
 **********
 PARAMETER DEFINITIONS:
    NO.   NAME         VALUE      STEP SIZE      LIMITS
     1 a1           3.00000e+00  1.00000e-01     no limits
     2 a2           1.00000e+00  1.00000e-01     no limits
     3 a3           1.00000e-01  1.00000e-02     no limits
     4 a4           1.00000e-02  1.00000e-03     no limits
 **********
 **    2 **MIGRAD         500           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=90047.1 FROM MIGRAD    STATUS=INITIATE       14 CALLS          15 TOTAL
                     EDM= unknown      STRATEGY= 1      NO ERROR MATRIX       
  EXT PARAMETER               CURRENT GUESS       STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1           3.00000e+00   1.00000e-01   1.00000e-01   2.81614e+05
   2  a2           1.00000e+00   1.00000e-01   1.00000e-01  -2.73395e+05
   3  a3           1.00000e-01   1.00000e-02   1.00000e-02  -3.08505e+05
   4  a4           1.00000e-02   1.00000e-03   1.00000e-03   3.53925e+05
 MIGRAD MINIMIZATION HAS CONVERGED.
 MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
 EIGENVALUES OF SECOND-DERIVATIVE MATRIX:
        -6.7583e-05  7.2937e-05  4.1376e-02  3.9586e+00
 MINUIT WARNING IN HESSE   
 ============== MATRIX FORCED POS-DEF BY ADDING 0.004026 TO DIAGONAL.
 FCN=10.3986 FROM HESSE     STATUS=NOT POSDEF     23 CALLS         112 TOTAL
                     EDM=0.11462    STRATEGY= 1      ERR MATRIX NOT POS-DEF
  EXT PARAMETER                APPROXIMATE        STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1           2.51776e+00   4.70562e-02   6.10330e-06   1.74962e+00
   2  a2           1.39551e+00   8.92752e-02   1.31410e-05   6.70438e+00
   3  a3           2.53639e-01   9.47122e-02   1.16109e-05   4.39325e+00
   4  a4           6.07417e-02   4.27989e-02   9.90333e-06  -3.17219e+00
 MIGRAD MINIMIZATION HAS CONVERGED.
 MIGRAD WILL VERIFY CONVERGENCE AND ERROR MATRIX.
 COVARIANCE MATRIX CALCULATED SUCCESSFULLY
 FCN=5.83333 FROM MIGRAD    STATUS=CONVERGED     232 CALLS         233 TOTAL
                     EDM=0.000805787    STRATEGY= 1      ERROR MATRIX ACCURATE 
  EXT PARAMETER                                   STEP         FIRST   
  NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
   1  a1           2.15261e+00   1.03160e-01   3.03942e-06   4.51207e+00
   2  a2           8.11243e-01   2.53816e-01   5.62214e-06  -2.40932e+00
   3  a3           1.71312e-01   4.00514e-01   4.93858e-06  -2.98664e+00
   4  a4           1.01582e-01   1.60321e-01   4.18094e-06   3.54130e+00
 EXTERNAL ERROR MATRIX.    NDIM=  25    NPAR=  4    ERR DEF=1
  1.064e-02  1.057e-02  1.069e-02  2.338e-03 
  1.057e-02  6.442e-02 -7.901e-02 -3.415e-02 
  1.069e-02 -7.901e-02  1.604e-01  6.357e-02 
  2.338e-03 -3.415e-02  6.357e-02  2.570e-02 
 PARAMETER  CORRELATION COEFFICIENTS  
       NO.  GLOBAL      1      2      3      4
        1  0.99974   1.000  0.404  0.259  0.141
        2  0.99985   0.404  1.000 -0.777 -0.839
        3  0.99995   0.259 -0.777  1.000  0.990
        4  0.99980   0.141 -0.839  0.990  1.000