[Newbies] Tsunami error in squeak

[itsme213]

I'm trying to load into Squeak 3.8 the latest Tsnuami from Monticello (after 
successfully loading PackageInfo-Base-avi.20). I get:

    Error: key not found

(apparently from SystemDictionary not containing #MCPostscriptDefinition)

Any idea what I may be doing wrong?

Thanks!