Thanks Matt, I'm not sure what exactly caused the issue. It wasn't missing device/padstack etc. as the parts were in place/manually, and I had no problem placing them manually. Have you guys moved up to 15.2 yet? Regards, Austin -----Original Message----- From: Matt Dunn [mailto:mdunn@xxxxxxxxxxxxxx] Sent: Monday, March 21, 2005 10:41 AM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Re: Component disappearing from board while importing logic Hi Austin It should place the revised symbol even if it creates a drc. The only things we've run into that will cause it not to place are: No device file, but then the netlist won't read in either. No Symbol in the board or library. A padstack used by the new symbol that is not in the board or available in the library. Austin Franklin wrote: Hi Matt,I had tried those options. It may be, in my case, that if the footprint was changed in physical size, say, from an 0402 to an 0603 and the new footprint would create a DRC error and it won't place it. If DRC is why, then I could turn DRC off and see.Regards,Austin -----Original Message----- From: Matt Dunn [mailto:mdunn@xxxxxxxxxxxxxx] Sent: Monday, March 21, 2005 9:40 AM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Re: Component disappearing from board while importing logic Under inport logic, ther is an option block for what to do with changed components. Pick always and changed components will be placed where they were, unless the symbol or a padstack is not available. Austin Franklin wrote: Hi Trilok,When you say you changed JEDAC, do you mean the physical symbol (PCB footprint)? If so, then it will do just as you say in my experience. It only keeps placement of components that are the same physical symbol (and REFDES). Unless there is an option somewhere that prevents it from doing that, it's the way it works.The way to avoid this, possibly, is to change the footprint manually by using "Logic/Part Logic" and changing the "Allegro Packages" for the parts you want to change.Regards,Austin -----Original Message----- From: Budathoki, Trilok (GE Consumer & Industrial) [mailto:trilok.budathoki@xxxxxx] Sent: Monday, March 21, 2005 1:47 AM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Component disappearing from board while importing logic Hi Everyone,Here's a problem while importing Logic in allegro. Board is completely routed & I am re-importing logic with minor changes, Some of the components are disappearing from board & appears on the Menu --> Place -->Manual --> Components by ref des.We have changed JEDAC only for changed components. In Import logic, I have tried all possible options. This problem is both in Allegro Designer & Expert. We use version 15.2 Has anyone faced similar problem & got any remedy.Thanks in advance.Trilok Budathoki GE - India Business Center (: 91-40-27881731(Direct) * : trilok.budathoki@xxxxxx -- Matt Dunn Director of Design Operations Applied CAD Knowledge, Inc. matt@xxxxxxxxxxxxxx 978-649-9800 -- Matt Dunn Director of Design Operations Applied CAD Knowledge, Inc. matt@xxxxxxxxxxxxxx 978-649-9800