Hi all - I'm using swindle and run into quite a bit of "top-sort: invalid constraints" errors, which by itself doesn't say much.  From what I can tell the error specifically happens during the chain of initialization (I add custom initialize method for the object), and seems like any sort of error occurring within initialize would trigger this error, which is puzzling because looking at tiny-clos it's not obvious what the top-sort routine does and what constraints it has. Have anyone else run into this error before and can shed some light on how to troubleshoot it?  Or perhaps constructor-like initialization isn't the way to use swindle? Any thoughts are appreciated, thanks. yc