Hello, I have issues to copy/paste Block diagrams on Quartus Prime edition. Would you recommend something to solve this? Thank you in advance for your answer. Best regards, Fabrice

I have found a solution to this issue.

On my system I was running an instance of VirtualBox with the shared clipboard plugin enabled.

For whatever reason when this plugin is enabled, Quartus does not allow pasting in block diagram view.

When I disable the shared clipboard plugin or close VirtualBox, I am able to copy and paste in Quartus.

To disable the shared clipboard in VitualBox go to

Machine --> Settings --> General --> Advanced --> Shared Clipboard --> Disabled

Perhaps this issue could also be caused by other programs which interface with the native operating system's clipboard?