Hi, i’m having a really strange bug with copy/paste in blueprints & material editor.
Sometimes a copy and paste works fine where as other times I get a “none” variable or function based on what I copied and sometimes a warning “one or more copied nodes could not be pasted into this graph“. This can happen with any function or variable, even ones inherited from the engines source or ones created from scratch in new actors.
I narrowed it down to how the node is being copied and it seems to sometimes remove the formatting for the copied data, here is an example of how that would look on my end.
CTRL + C broken format:
Begin Object VariableReference= NodePosX= NodePosY= NodeGuid= CustomProperties Pin () CustomProperties Pin () End Object
CTRL + C correct format:
Begin Object
VariableReference=
NodePosX=
NodePosY=
NodeGuid=
CustomProperties Pin ()
CustomProperties Pin ()
End Object
I’m really stumped on what is causing this issue, it seems to be clipboard related as duplicate works fine. I have only started having the issue for the past week out of nowhere.
What I have tested so far/replicated:
Copy/Paste with other windows software outside of UE.
Tested clipboard with notepad++ to see if I get the same format issue there but nothing, works fine.
Persists across engine versions (5.4, 5.5, 5.7) (I installed 5.7 today to test it there, I’m using 5.4 the most).
Created fresh projects.
Verified install and plugins.
Deleted shared cache in AppData
Made sure windows clipboard history is disabled.
PC Restart
GPU Drivers
Tested without background apps.
Last Windows 10 update installed was on March 10th so probably not related to that.
I get this with the whole editor. Sometimes it just decides it needs CTRL-C to be pressed twice to copy. Also CTRL-S needs two gos to save, and copying actors in a map has the same problem.
Same issue here since quite a few weeks/months now. I don’t remember how but some mix of compiling the blueprint/closing its window and reopening used to fix this but not anymore. Restarting the editor indeed fixes it for me too.
Restart never fixed my problem as I did that a ton of times debugging the issue over the week, my viewport copy/paste worked fine, it was strictly BP node related.
What is weird is that it fixed itself randomly two nights ago and I have no idea why, I was in the material editor when I noticed it working again. I was also in a different engine doing some prototype stuff out of frustration with my other project where this issue started, Unreal…
And… its back again!
Same problem however I had another issue to add onto this which may be related. So the other day I had a problem where any project would just close as soon as I opened it, I checked my source in VS2022 and it was missing files needed to view the project. I had to regenerate it and wipe my viewport configs in app data just to open the project again, no idea why i’m getting all of these problems all of a sudden? Might have to try a full reinstall of the engine which is pure pain while on a 50mb/s internet… fun times.
Zooming out in the graph and pasting in a clean area away from other nodes tends to work for me. It’s like the editor is checking for space (bounds of copy not overlapping bounds of existing). weird but it works most of the time.
Tried a full reinstall of the engine and the epic launcher, problem still persists with a fresh install of 5.4. At this point i’m just going to blame Windows, what is even happening to cause this in one particular software while not in others? Makes no sense, I just want to work and this bloody issue is slowing me down while frustrating the hell out of me!!!
