I dumped the classlib definition into a text file. This gives this:

D:\WWW\CLASSES\WWMSMQ.VCX ALIAS WWMSMQ
D:\WWW\CLASSES\WCVISUAL.VCX ALIAS WCVISUAL
D:\WWW\CLASSES\WWIPSTUFF.VCX ALIAS WWIPSTUFF
D:\WWW\CLASSES\WWXML.VCX ALIAS WWXML
D:\WWW\CLASSES\WWSQL.VCX ALIAS WWSQL
D:\WWW\CLASSES\WWBUSINESS.VCX ALIAS WWBUSINESS
D:\WWW\FOURNIERTRANSFORMATIONLISTE.VCX ALIAS FOURNIERTRANSFORMATIONLISTE
D:\WWW\FOURNIERTRANSFORMATION.VCX ALIAS FOURNIERTRANSFORMATION
D:\WWW\UNIVERSA\UNIVERSALTHREADMASTER.VCX ALIAS UNIVERSALTHREADMASTER
D:\WWW\UNIVERSA\UNIVERSALTHREADLIST.VCX ALIAS UNIVERSALTHREADLIST

But, this is from an EXE. Those paths are also not available in production. So, how does the SET CLASSLIB able to interpret all this?