Yes. I got an error.
I tried with the xLimitBar example in B4X Booklet.
B4X:
B4A Version: 12.80
Parsing code. Error
Error parsing program.
Error description: Unknown type: b4xmainpage
Are you missing a library reference?
Error occurred on line: 73 (B4XPages)
Public Sub MainPage As B4XMainPage
Try to add #ExcludeFromLibrary: True to B4XMainPage and make sure that it isn't referenced by any of the library modules.
I recommend using b4xlibs in most cases.