DEar, All
 
I had create block, and i want to delete. but unable to delete,
 
please advise on how to delete the block.
 
REgard's
Cy

If there are no Inserts of the block within the drawing, you can remove the Block definition using the "purge" command.

Can anyone help with this aswell, i have loads of blocks with the prefix IGV_.  Example: IGV_walls, IGV_doors, IGV_windows, etc. How do i delete them? I can only see them in the insert block drop down list, they are not in the purge blocks list. Please help.

The [CMD]PURGE[/CMD] dialog offers only blocks which are unused - not referenced anywhere in the drawing. You have to delete their references first (e.g. with [CMD]QSELECT[/CMD])