noncoplanar situation

Greetings --

I'm using AutocadLT98. Sometimes I get problems with the lines
or objects being non-coplanar. Why does this happen and how can
I fix it? It doesn't make any sense that I draw one line on the
XY plane and then draw another on the same plane, but they end
up different places on the Z coordinate. Is there a way to
flatten a drawing that has a bunch of non-coplanar lines and
blocks?

Thx

M9

 

Did someone with full Acad/Icad work on the file before you?

 

http://xarch.tu-graz.ac.at/autocad/news/faq/autocad-faq-part2.txt

[2.10] How to set objects to Zero Elevation? FLATTEN.LSP