Recently I have started to see in the block list names like “InstanceDefinition ##”
You can insert these blocks into the file but cannot select them. They appear to be empty. I have not figure out what causes this.
Hi - please let us know when you have found a way to reproduce that.
-wim
To give me a hint for looking, do you folks know the circumstances when “Instance Definition” is created?
Hi - I’ve only seen it mentioned on threads that involve coding of some kind. Are you writing scripts in python, C#, …? When you delete block definitions from a file, there still has to be something around to be able to undo this operation when the user changes their minds. This could be related to that.
-wim
I have some simple scripts that I run now and then but none would delete blocks. I only have one that uses blocks but it does not create “InstanceDefinition ##” However, I have only run it on the file pictured above. But that is probably coincidence because I have seen this issue in other files.
Script in question:
import Rhino
import scriptcontext
import rhinoscriptsyntax as rs
def BlockAtPoints():
pts = rs.GetObjects(“Select points …”, filter=1)
blockName = rs.GetString(“Name of block to copy …”)
if pts:
for pt in pts:
if rs.IsBlock(blockName):
rs.InsertBlock(blockName, pt, [1,1,1], 0)
else:
print "No valid block name entered."
else:
print "No points selected."
BlockAtPoints ()
