Hmmm, a very strange case. I was doing this previously and the plot was not appearing. But now is ok. I hope that it will be ok also tomorrow .

I have corrected the point numbers and the graphic of the Delft network is presented below:
graphic
and the project is on: http://pracownicy.uwm.edu.pl/krzysztof.nowel/new_Delft_1D.rar
and the final (after congruence analysis) project is on: http://pracownicy.uwm.edu.pl/krzysztof.nowel/Delft_1D_final.rar
Maybe it will be somehow helpful for the JAG3D community.

Many thanks, Micha, on behalf of Polish students of geodesy . JAG3D is very friendly and helpful for them.

Best regards,
Krzysztof Nowel