My experience of the tutorial is that generation of core.vst is successful only if the setenv MBK_CATA_LIB sclib AND padlib, are ammended to read /share/cells, not /cells. This appears twice in the tutorial in that just before the reader is asked to generate the core, the environment for CATA_LIB is set again, to sclib. (It MIGHT be efficient to change the TOP definition to /share, during the tutorial, but would impact on at least /bin path definition...not desirable perhaps) -the tutorial requires ammending accordingly -This, like my previous redhat thread, has been previosly encountered by 31/7 poster, Suvada, who perhaps will benefit from this post Regards Chris