There is no Class with this Name
From Xojo Documentation
Error message
You used a nonexistent class name.
Sample Code
Using nonexistent class names on a Var statement.
Var fred As Husband // 'Husband' not a data type
Var f As Folder // should be FolderItem
Var d As longdouble // no such thing; programmer is lost
Var f As Folder // should be FolderItem
Var d As longdouble // no such thing; programmer is lost
Using a nonexistent class with the New operator.