Error @ restart step during BIOS to UEFI conversion TS

[krdell]

For my HP machines, I am trying to run a TS booted from USB into WinPE to format disk, make necessary changes in BIOS, then reboot into UEFI mode the apply OS.  The format disk and BIOS changes (using the BIOS config utility from HP) go through with no problem but encounter an error immediately upon getting to my reboot step. smstslog tells me "Unable to find a partition on the system disk that can be set as active" but im 95% positive im partitioning this thing proper.  After the failure error message, the machine then reboots into UEFI so go figure.   smstslog and TS attached.  Any advice appreciated! 

Unable to find a partition on the system disk that can be set as active TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
ValidateSystemPartition(), HRESULT=80070490 (e:\nts_sccm_release\sms\framework\tscore\bootimage.cpp,1062) TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
Failed to prepare the system partition for staging. 
Element not found. (Error: 80070490; Source: Windows) TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
BootImage::PrepareForStaging(sLocalDataPath), HRESULT=80070490 (e:\nts_sccm_release\sms\framework\tscore\bootimage.cpp,783) TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
Failed to validate for boot image staging TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
StageBootImage() failed. 0x80070490. TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
TS::Boot::BootImage::StageBootImage(sBootImageID, StageBootImageProgressCallback, (LPVOID) m_sStageBootImageMessage.c_str()), HRESULT=80070490 (e:\nts_sccm_release\sms\client\tasksequence\executionengine\engine.cxx,972) TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
Failed to stage a boot image BMR00171. 
Element not found. (Error: 80070490; Source: Windows) TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
Failed to reboot the system. Error 0x80070490)  TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
RebootSystem(pwszRebootMessage, dwRebootTimeout, dwRebootReason, bRebootWinPE), HRESULT=80070490 (e:\nts_sccm_release\sms\client\tasksequence\executionengine\engine.cxx,622) TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
Failed to initialize a system reboot. 
Element not found. (Error: 80070490; Source: Windows) TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
CheckForRebootRequest(&bRebootInitiated), HRESULT=80070490 (e:\nts_sccm_release\sms\client\tasksequence\executionengine\engine.cxx,310) TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
Fatal error is returned in check for reboot request of the action (Restart Computer). 
Element not found. (Error: 80070490; Source: Windows) TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)
An error (0x80070490) is encountered in execution of the task sequence TSManager 12/8/2017 9:36:58 AM 1596 (0x063C)