Error "Add ZHC point not on GRID"

this error is raised during the creation of the z height compensation (zhc) grid when one of the following is the case difference between the coordinate of the new point and the first point is less than 0 on the x axis difference between the coordinate of the new point and the first point is less than 0 on the y axis difference between the point position on the x axis and the grid column is more than 0 01 difference between the point position on the y axis and the grid row is more than 0 01 note that the first point of the z height compensation grid needs to be the numerically lowest value the grid measurement extends in positive x and y directions note that relative grid rows/columns positions are multiplications of the spacing ("grid size" in the macro)