Using arguments in a subpatch window’s title bar

In a project I have made with Max 4.6, I used a patcher message box to change the title of a subpatch window displaying graphics. All those graphics were numbered and indentified by their respective number in the title bar. In Max 4.6, the text needed in the message box to automatically change the window title, with an argument in it, was simple:

[patcher Exercise # $1]

Despite the fact that quotation marks seem to be needed before and after the new title in a patcher message box in Max5, the use of an argument in the title doesn’t seem to work anymore. Is there another way to accomplish this in Max5?

Thanks in advance.