Josef,
>SET CLASSLIB ADDITIVE is giving an error 'Alias name is already in use'. When I am giving another alias for the CLASSLIB the old error 'Error instatiating class. Cannnot find c:\mmortals\common30\libs\cenviron.vcx' appears...???>
Are you using the IN clause of SET CLASSLIB?
Regards,
Kevin McNeish
Eight-Time .NET MVP
VFP and iOS Author, Speaker & Trainer
Oak Leaf Enterprises, Inc.
Chief Architect, MM Framework
http://www.oakleafsd.com