Hi,     I am working on AutoCAD 2015, I have always used the CTRL+V and CTRL+C commands for copy/paste and I have never had this problem.When I copy using CTRL+C and paste using CTRL+V, it automatically pastes as a block, even if I copy a simple line, it will past it as a block... if I use the command CO for copy then this doesn't happen, it actually pastes normally. Now this would all be ok, I would simply use CO when I need to, but the thing is, that I do a lot of copy pasting from other files and from model to layout and I find it much easier to use the keyboard commands thus I would like to fix this. I have also tried audit, purge and Wblock and none of them worked.   When I open a new file this isn't a problem and if I try to use this file on another autocad-another computer I get the same problem so I presume that the problem is in the file itself.   Does anyone know how to solve this problem?

What is the original source of the file you are having the problem with?

Try using EXPLODE function after it pastes it as ablock