Danorc & Gyana:

This issue may be related to the Windows UAC (User Account Control) settings on your machine. Under Control Panel > User Accounts > User Accounts turn off the User Account Control, restart CAESAR and try the isometric extraction again.

Regards,
Dominik Hepp
Technical Support
CADWorx & Analysis Solutions
Intergraph Process, Power, & Marine
12777 Jones Road, Ste. 480, Houston, TX 77070 USA