This message appears for worksheets and products licensed separately, such as the Advanced Engineering Mathematics with Maple e-book.

Before any worksheet in a licensed e-book is opened, Maple verifies whether you have the appropriate license for that book.

Solution:

If you received this message, see the installation instructions on how to activate your license, or contact the worksheet vendor.

Maplesoft Support, Maplesoft Web Store, Maple Toolboxes, Third-Party Products, Maple E-Books & Study Guides