ICX 7550 UFI Firmware upgrade via TFTP Failing - Code 17

[lalalava]

I am attempting a firmware upgrade of my ICX 7550 L3 switch stack via TFTP. From Version 08.0.95fc to 10.0.1g (stability release).  When attempting to copy from the TFTP, I am getting persistent timeout errors on the TFTP server and eventual failure on the switch side. 

I have set up a PC as a TFTP server (10.17.2.100) and downloaded the new OS .bin image ("GZR10010g_cd6ufi.bin")  that I am wanting to install. 

I was able to copy configurations successfully from the Core to the TFTP server successfully

"copy running-config tftp 10.17.2.100 old_run" succeeds. File is copied to the TFTP location

When I try to copy from the TFTP server to the core, it fails. 

"copy tftp flash 10.17.2.100 GZR10010g_cd6ufi.bin secondary"  failing

Return failure code to the stack is "error code 17"

Troubleshooting steps so far include:

1. Trying different file locations

2. Checking file permissions

3. Disabling Windows firewall 

4. Rebooting the stack

5. Running TFTP server application as administrator 

Any ideas are appreciated!