Command Line Macro?

On my menus, I have pull downs for different items I like to import into the drawings. In the last couple of releases for v26, I have noticed them not working as they used too. Here is an example of the Command that is inputted:

^C^C_-insert Valve-01 \;;;

It does pop-up this screen:

I can't seem to find any notes on this. Is there a blog post or forum post explaining how I must go about using certain format in the Command Line? I have searched but seem to be coming up short.