Using Altera Quartus 15.1 on Intel i7, 64 GB RAM on Win 10. Text editor, copy feature via Control + C does not work. I have Altera Quartus 15.0 and 15.1 installed. I need both versions installed. Control+C works just fine in 15.0.
I tested the Intel Quartus Prime Standard Edition v15.1 on Win 10, I can copy using CTRL+C key in text editor.
Can you try in other PC and see if the problem persists?
If I do a clean install of 15.1 then CTRL+C works just fine. But I needed to install 15.0 also.
After installing 15.0 CTRL+C stopped working in 15.1. But CTRL + C works in 15.0.
I did another clean install with deleting the 15.0 and 15.1 directories after uninstall, reboot, installed 15.0 then 15.1 and had the same problem. Works fine in 15.0 but not in 15.1.
I tried to launch both v15.0 and v15.1 in Win 10. The CTRl + C works in both versions.
Have you try in other machine? Could you use right click > copy as a workaround?
This is still a bug in 20.1. Judging from the responses, apparently it depends on random variables specific to some installations, so I wonder if it'll ever get fixed.
I've found two work-arounds: Use Ctrl-Insert instead, or just get used to using Ctrl-X/Ctrl-V in rapid succession, which has the same effect.