Dell BIOS Flash64w during OSD

I currently image all dell computers with WDS/MDT. I currently have a TS's that does the following
1) copies files to "x:\Bios" folder
2) runs a bat file from "x:\bios" folder. Bat file script is:

::Change DIR::
cd /d x:\bios

::Flash Bios::
Flash64W.exe /b=OptiPlex7050.exe /s /f /noReboot /l=x:\bios\OptiPlex7050.log 

I have also tried just: /s /noReboot and /s /l=x:\bios\OptiPlex7050.log

The TS command line is: cmd /c x:\bios\7050.bat

I have read the logs and it shows a success code = 2 Reboot Required, however it breaks the task sequence and salmon screens resulting in an error. After the BIOS Upgrade TS runs, the next TS is a restart so the bios can finish updating and then boot back into MDT so it resume where it left off. 

I am running this on an OptiPlex7050, upgrading bios 1.11.x to 1.12.x  

The purpose of the bios being updated in the beginning is to have the CCTK tool change bios settings, such as Legacy to UEFI and other such stuff that requires the WMI ACPI bios.

 Thanks for any support.