Proper switch commands needed for Flash64w OSD BIOS Update

Please correct me if I'm in the wrong section. Couldn't figure out where to post this:

I currently image all dell computers with WDS/MDT. I currently have a TS's that do 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)

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. The next TS is a restart so MDT will 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.