Hello zxy55,

I can confirm now the report works perfectly.

Thank you.

I don't know the backend of the code, but i have noticed if i include these unknow points, they affect the parameters of transformation.

I cannot confirm this behavior.

Let the source system be

# J. L. Awange, Erik W. Grafarend - Solving Algebraic Computational Problems in Geodesy and Geoinformatics
# ISBN: 978-3540234258
# 3D-Helmert-Transformation 
# Startsystem

      Solitude 664789.307 4157222.543 4774952.099
    Buoch-Zeil 688836.443 4149043.336 4778632.188
  Hohenneuffen 690340.078 4172803.511 4758129.701
   Kuehlenberg 642997.635 4177148.376 4760764.800
  Ex-Mergelaec 671808.029 4137012.190 4791128.215
 Ex-Hof-Asperg 666952.887 4146292.729 4783859.856
Ex-Kaisersbach 702670.738 4138759.902 4785552.196

and the target system be

# J. L. Awange, Erik W. Grafarend - Solving Algebraic Computational Problems in Geodesy and Geoinformatics
# ISBN: 978-3540234258
# 3D-Helmert-Transformation 
# Zielsystem

      Solitude 664818.678 4157870.237 4775416.524
    Buoch-Zeil 688865.785 4149691.049 4779096.588
  Hohenneuffen 690369.375 4173451.354 4758594.075
   Kuehlenberg 643026.700 4177796.064 4761228.899
  Ex-Mergelaec 671837.337 4137659.549 4791592.531
 Ex-Hof-Asperg 666982.151 4146940.228 4784324.099
Ex-Kaisersbach 702700.227 4139407.506 4786016.645

The parameters of the spatial Helmert transformation reads

If we add some random points to the source system

         NEW-1      1.000       2.000       3.000
      Solitude 664789.307 4157222.543 4774952.099
    Buoch-Zeil 688836.443 4149043.336 4778632.188
  Hohenneuffen 690340.078 4172803.511 4758129.701
         NEW-2      4.000       5.000       6.000
   Kuehlenberg 642997.635 4177148.376 4760764.800
  Ex-Mergelaec 671808.029 4137012.190 4791128.215
 Ex-Hof-Asperg 666952.887 4146292.729 4783859.856
Ex-Kaisersbach 702670.738 4138759.902 4785552.196
         NEW-3      7.000       8.000       9.000

the solution reads

and is identical.

/Micha