I think it has nothing to do with MacPerl directly. It might be the installer program which doesn't run on your machine. NavigationLib isn't usually installed as a seperate file but is part of System. I don't know exactly but from 8.6 on it should be integrated.
Search for "NavigationLib" and "installer" on google. There are a lot of troubleshooting hints. HTH Axel Um 0:10 Uhr -0600 06.01.2002, schrieb daltman: >I just tried to fire up the newly acquired MacPerl 5.6.1b2 and was greeted with a >dialog box saying that it couldn't find "NavigationLib". WHAT is that? It's not on >any of my (admittedly antique) machines running everything from System 6.1 to OS >9.0.4 and searching Apple, Tucows, AMUG, VersionTracker, and SourceForge produced no >results. Any idea what this message means?