I had no idea I was engaging so many people. The problem has resolved to a Python versioning issue, and has been solved. This was aggravated by the fact that when Python is invoked by issuing a shell command to ‘call’ a *.py file, the mapping to python version follows the Windows shell when one of the EDK shell variables is not initialized – I think it was PYTHON_COMMAND, but I don’t remember. Basically, Windows has an opinion about which Python to invoke when BUILD.BAT executes this line: @%PYTHON_COMMAND% %BASE_TOOLS_PATH%\Source\Python\%ToolName%\%ToolName%.py %* . So, I was bitten by a Python 😝 Thanks to all of you for your assistance. UEFI spelunking can be a lonely art. It’s nice to meet other travelers. Eric Oh, and I was using tag 202002. We don’t need no steenkin’ upgrades! From: gaoliming Sent: Wednesday, May 19, 2021 7:24 PM To: devel@edk2.groups.io; bret.barkelew@microsoft.com; 'Hernandez Miramontes, Jose Miguel' ; Fowler, Eric (Mondo International, LLC) Subject: [External] 回复: [edk2-devel] A plea for help This issue has been fixed in edk2 trunk. Can you try the latest edk2? Thanks Liming 发件人: devel@edk2.groups.io > 代表 Bret Barkelew via groups.io 发送时间: 2021年5月20日 0:33 收件人: Hernandez Miramontes, Jose Miguel >; devel@edk2.groups.io; Fowler_Eric@ne.bah.com 主题: Re: [edk2-devel] A plea for help Yup, I was tired. Read the Python version all wrong. - Bret ________________________________ From: Hernandez Miramontes, Jose Miguel > Sent: Wednesday, May 19, 2021 7:15:30 AM To: devel@edk2.groups.io >; Bret Barkelew >; Fowler_Eric@ne.bah.com > Subject: [EXTERNAL] RE: [edk2-devel] A plea for help So, the problem is here. File "C:\EDK2020\district-defend\edk2\BaseTools\Source\Python\Common\Misc.py", line 1638, in __init__ if ByteArray.tostring() != b'PE\0\0': see: https://docs.python.org/3/whatsnew/3.9.html array.array: tostring() and fromstring() methods have been removed. They were aliases to tobytes() and frombytes(), deprecated since Python 3.2. (Contributed by Victor Stinner in bpo-38916.) you could try python 3.8 or cherry pick this change. https://github.com/tianocore/edk2/commit/43bec9ea3d56f3662ede78023baa2a791b66acac Jose Miguel Hernandez Miramontes BIOS Engineer jose.miguel.hernandez.miramontes@intel.com Intel Corporation From: devel@edk2.groups.io > On Behalf Of Bret Barkelew via groups.io Sent: Wednesday, May 19, 2021 3:12 AM To: devel@edk2.groups.io; Fowler_Eric@ne.bah.com Subject: Re: [edk2-devel] A plea for help Have you tried the latest Python 3.x? - Bret From: Fowler, Eric (Mondo International, LLC) via groups.io Sent: Wednesday, May 19, 2021 12:41 AM To: devel@edk2.groups.io Subject: [EXTERNAL] [edk2-devel] A plea for help build.py... : error C0DE: Unknown fatal error when processing [c:\edk2020\district-defend\edk2\MdeModulePkg\Universal\Console\GraphicsConsoleDxe\GraphicsConsoleDxe.inf] (Please send email to devel@edk2.groups.io for help, attaching following call stack trace!) (Python 3.9.5 on win32) Traceback (most recent call last): File "C:\EDK2020\district-defend\edk2\BaseTools\Source\Python\build\build.py", line 2596, in Main MyBuild.Launch() File "C:\EDK2020\district-defend\edk2\BaseTools\Source\Python\build\build.py", line 2391, in Launch self._MultiThreadBuildPlatform() File "C:\EDK2020\district-defend\edk2\BaseTools\Source\Python\build\build.py", line 2271, in _MultiThreadBuildPlatform self.CreateAsBuiltInf() File "C:\EDK2020\district-defend\edk2\BaseTools\Source\Python\build\build.py", line 2401, in CreateAsBuiltInf Module.CreateAsBuiltInf() File "C:\EDK2020\district-defend\edk2\BaseTools\Source\Python\AutoGen\ModuleAutoGen.py", line 1503, in CreateAsBuiltInf PatchList = parsePcdInfoFromMapFile( File "C:\EDK2020\district-defend\edk2\BaseTools\Source\Python\GenPatchPcdTable\GenPatchPcdTable.py", line 59, in parsePcdInfoFromMapFile return _parseGeneral(lines, efifilepath) File "C:\EDK2020\district-defend\edk2\BaseTools\Source\Python\GenPatchPcdTable\GenPatchPcdTable.py", line 174, in _parseGeneral efisecs = PeImageClass(efifilepath).SectionHeaderList File "C:\EDK2020\district-defend\edk2\BaseTools\Source\Python\Common\Misc.py", line 1638, in __init__ if ByteArray.tostring() != b'PE\0\0': AttributeError: 'array.array' object has no attribute 'tostring' - Failed - Build end time: 21:15:31, May.18 2021 Build total time: 00:07:11