VZM31-SN OTA Update Failing on two switches - (A - 2.08) and (B - 2.00) Won't Update to Stack 0.3 build 4

Product Support Hardware & Firmware Help
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I recommend reading through this thread: VZM31-SN Firmware upgrade failures going from 2.18 to 3.04

There’s several different steps that are suggested there but if all else fails, you’ll need to do a cabled flash.