Chipshouter Upgrade Error

Whenever I try to update the firmware in the Chipshouter using the method:

cs.update_firmware(“./cw520_******_2-0-3_firmware.fup”)

It hangs forever after displaying this:

Connection successful
Sending: ./cw520_******_2-0-3_firmware.fup
Checking board ID…

However if I unpack the .fup file and just use the out.bin all is OK.

cs.update_firmware(“./out.bin”)

Works without an issue.

We are experiencing stability issues with our Chipshouter and I thought I would start by eliminating the issues that we see.