Lets assume that you have an S5720 which is acting as an AC. You have APs connected to the S5720 and you want to make an upgrade using web interaface. When you will try to upload bin file you will receive the following error.
It is not possible to upload bin file using web interface. The solution is to use CLI.
A request has been raised in order to be able in next software version to upload bin file through WEB interface.