You cannot add or remove files from a read-only project. If you attempt to make any changes to a read-only project, a message box displays indicating that your changes will not be saved to the project.
For example, Unable to save changes to the current project. The project file has read-only attributes.
When you click OK on the error message box, Silk Test Classic adds or removes the file from the project temporarily for that session, but when you close the project, the message box displays again. When you re-open the project, you will see your files have not been added or removed.
Additionally, if you are using Microsoft Windows 7 or later, you might need to run Silk Test Classic as an administrator. To run Silk Test Classic as an administrator, right-click the Silk Test Classic icon in the Start Menu and click Run as administrator.