Maxscript: How to avoid crash on undo of UpdateShape()

[Anonymous]

--How do i Avoid a Crash when Undo?
local sp = splineShape()
addnewSpline sp
addKnot sp 1 #corner #line [20,10,0]
addKnot sp 1 #corner #line [-20,11,0]
addKnot sp 1 #corner #line [-20,-11,0]
addKnot sp 1 #corner #line [20,-10,0]
close sp 1
updateShape sp

[drew_avis · Accepted solution]

You could try turning off undo with something like

undo off (
	updateShape sp
)

 There are some caveats though, have a look at:

http://help.autodesk.com/view/3DSMAX/2020/ENU/?guid=GUID-A731E672-9B9A-4D5B-A8A7-EA584AD12FE5

Hope that helps,

Drew