Geomcal.arx works fine at ACAD2007 , but not at ACAD 2018.
There is a new geomcal, or a geomcal substitute?; error: ARXLOAD failed
Thanks
If you ask, I have a lisp not mine, that use CAL function , and it do not can be used at 2018.
Find attached 3Dhedron
Of course all CAL function can be replaced by LISP functions.