Rhino 6: copying to the clipboard take very long

Hi @pascal,

I have a customer report, that copying simple geometry objects to the clipboard takes up to 20 seconds.



Hi Michael - can you please ask them to try Purge for materials and see if a lot of materials are deleted (the command line will report how many) Also, I seem to remember VRay had a problem with this and that it is fixed in the latest VRay - if your customer uses VRay, you might ask them to update and see how that works.


Hi Pascal,

I think they have no plug-ins installed, also there is no V-Ray for Rhino 6 at the moment.

I will ask them, if _purge brings something.

Thank you


Oh, yeah, of course…


i have got same problem since this morning…
every copy of a surface or a simple curve take 5 seconds…
do you know where i can purge the clipboard

I am also curious if there is a way to purge the clipboard. Like in excel, clear clipboard.


Hi Michael and all,
Coping to the clip board is an export operation. So if you are coping an object or a set of objects to the clip board and they have a lot of user data and materials, it may take a longer time.

What we want to know is:

  • How much time does it take to Export (File -> Export Selected)?
  • And can you send us the file so we can see what you are sending to the clip board?
  • What version of Rhino 6 are they running? Vray too? Any other plugins?
  • Also in a new model, draw line or circle? Does it take 20 second?

A file and these additional details will help.
Mary Ann Fugier
McNeel Technical Support and Training
Seattle, WA

Hi Mary,

ah, good to know. I don’t remember which customer had this problem. When he calls again, I will ask more details.



1 Like

My question is really separate from Vray. I use the copytoclipboard command in a script. it goes through a pile of files and one of the things it does to each file is copytoclipboard and then pastes it later on. I am finding that it is holding a lot of information on the clipboard. Can I clear the clipboard (or the temp file where the export selected is stored)?

Should I move this to a new thread?

Hello - you could just copy a space or single character to the clipboard-



I am copying geometry to the clipboard.

I mean to clear the clipboard - there’s only one, so if you send a tiny bit of text up there, the geometry will go away.


Oh. got it. Ill give it a try, thank you.