EAGLE cannot perform the requested action

EAGLE cannot perform the requested action

If your application has a full version aside from the light version then I guess you can refer or associate the light version to a program’s trial version. Usually, a trial version has the full version’s features but most of the time in trial version these features can’t be used because it requires that you upgrade your version to the full version.

This type of a trial version sometimes doesn’t expire because of limited functionalities. There are also trial versions that offer the full version’s functionalities and features, which as if you already installed the full version. But this kind of a trial version is, most of the time, offered with a limited time only or it expires after a specific number of days.

In your case, I guess the first type applies because you can’t use a certain function in the program since it is running on the light version. If you want to fix it and still use the function or command, you should upgrade to the full version. If your application is available in light version then there should also be a full version. Just upgrade to the full version and it should fix the problem.