Samsung Galaxy S6 Odin Flash Fail

I have a GS6 on either 5.0.1 or 5.0.2. I wanted to get rid of my root and go back to stock firmware while upgrading to 5.1.1.

Odin seems to always fail. I can go back to download mode or be instructed to restore via Verizon's software assistant. Here is what odin has to say. It fails at the system.img Verizon G920V

<OSM> Enter CS for MD5..
<OSM> Binary Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> All threads completed. (succeed 0 / failed 0)
<ID:0/004> Added!!
<ID:0/004> Odin engine v(ID:3.1100)..
<ID:0/004> File analysis..
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Get PIT for mapping..
<ID:0/004> Firmware update start..
<ID:0/004> SingleDownload.
<ID:0/004> sboot.bin
<ID:0/004> NAND Write Start!!
<ID:0/004> cm.bin
<ID:0/004> boot.img
<ID:0/004> recovery.img
<ID:0/004> system.img
<ID:0/004>
<ID:0/004> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)