Fei, I took a quick look and I did not see a Python stack trace. I'm not sure if your build wrapper ate it, or it does not exist? If I had to randomly guess there is some syntax error in your .INF file is crashing the Python that is parsing that INF file. Seems like you may have an issue with more than one INF file? Thanks, Andrew Fish > On Sep 30, 2019, at 3:00 AM, Wang, Fei1 wrote: > > Hi, > > I am working on a BIOS sighting, which need to build SKX/ICX BIOS to test. > Build commands: > WhitleyRpPkg\PlatformBIOSBuild.py -c SKX -b RELEASE -t VS15 > WhitleyRpPkg\PlatformBIOSBuild.py -c ICX -b RELEASE -t VS15 > > But the build tool always reports an unknow fatal error while processing a certain driver. > And it asks me to send email to devel@edk2.groups.io for help. > The attachment are 3 build logs for your reference. > > Note: > When I first encountered this issue, I tried several times of clean build, but not work. > Then I created a new workdirectory and downloaded a new source code, it is able to build pass for 1st time, after that met the unknow fatal error as well in the following builds. > I tried to re-download a new source code, but the failure happened starting from the 1st build. > Command to download source code: edkrepo clone . DCG10nm > > Till now, I am still stuck in the build issue, please help to take a look at this issue since it blocks our debug activity. > > Thanks, > Fei > > >