I am trying to solve a 3D network that has totally 6 points. There are 2 points with known (fixed) XY and 1 point with known Z. There are also 3 other points that are unknown in all XYZ.
What I want to do is solve the network so that the 2 points with known XY get a solved Z, the point with known Z gets solved XY, and the 3 points with unknown XYZ get solved in XYZ.
I thought that I have to import the 2 known XY points in "Reference Points 2D" and the one with known Z in "Reference Points 1D". I also imported the other 3 points in "New Points 3D". The observations are directions, Slope distances and Zeniths.
The software fails to solve the network and I get the message "Singular normal equation matrix. Error, could not invert normal equation matrix.". I suppose there is something wrong with the way I imported the known points, isn't it? If so, what it the right way to import points when some are known and fixed in 2D and some others in 1D?
By the way, if all points are imported as "Reference points 3D", the network gets solved.