For the second issue, you have to set the NASM_PREFIX to a path which ends with a slash. For the first one, could you provide the steps to reproduce it? Thanks, Bob From: Ni, Ray Sent: Sunday, June 30, 2019 9:23 PM To: Feng, Bob C Cc: 戴，曉政 ; Justen, Jordan L ; afish@apple.com; devel@edk2.groups.io Subject: RE: May I become a contributor in EmulatorPkg ? Bob, Any comments? From: 戴，曉政 [mailto:cloud0907@yahoo.com.tw] Sent: Sunday, June 30, 2019 3:37 PM To: Justen, Jordan L >; afish@apple.com; Ni, Ray > Subject: May I become a contributor in EmulatorPkg ? Dears, I live in Taiwan so please forgive my English pool. I download edk2 source code from Github recently and I encounter two build error when I build EmulatorPkg (I use Visual Studio 2017 ). First is in GenPcdDb.py, this error means parameter used to unpack is zero, please refer below : [cid:image001.jpg@01D53037.EAE294F0] Second is in tools_def.txt, this error means there is missing slash before nasm.exe, please refer below : [cid:image002.jpg@01D53037.EAE294F0] You can search “clouddai-test” in Attachment so that you will easy understand what I say. If I need submit more official document for become a contributor please let me know, or if my modification need obey some rule please also let me know, I am waiting your response