I dont have any option such as parameters in 15.1 Regards, Chandra Kanth ----- Original Message ----- From: Peter Hughes To: icu-pcb-forum@xxxxxxxxxxxxx Sent: Monday, February 06, 2006 18:37 Subject: [PCB_FORUM] Re: Purge Via List Hi Chandra, Follow these commands to delete unused vias. Route -> Gloss -> Parameters Uncheck all boxes except Via eliminate Click on the box next to Via eliminate Uncheck all boxes except Eliminate Stand Alone Vias Click OK Click Gloss Rgrds Peter Hughes, PCB Designer, Concurrent Technologies, 4 Gilberd Close, Newcomen Way, Colchester, Essex, CO4 4WN. Tel: +44 1206 752626 Fax: +44 1206 751116 -----Original Message----- From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Chandra Kanth Sent: 06 February 2006 12:49 To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Purge Via List HI all, I am using 15.1 and 15.2 allegro. I have a previously ddesigned board.Now I want to reroute that board.So I have deleted all the traces in the internal layers.I want top and Bottom to be rermained as same. After deleting all the traces now I want to purge all the unused vias.How can I do it? Can u please help me? Regards Chandra Kanth