Problem
I cannot copy and paste a node from other files.
Solution
This problem often occurs when trying to copy and paste a node from one to another network file. Copy and paste cannot be performed because the two network files were started in different processes.
Copy and paste can be enabled by the following procedure.
Click "File" -> "Open". Start the network file that contains the block to be copied.
Select the block to be copied, and click "Edit" -> "Copy "
" Edit " -> "Paste " at the copy destination
Also, you can use the following shortcuts
Ctrl-c Copy
Ctrl-x Cut
Ctrl-v Paste