Upgrad Firmware cisco small business sg300-28 28-prt gigabit managed switch error "Illegal software format"

[ren_rayuth]

Dear All

Default firmware : 1.2.9.44

I try to update firmware my cisco small business sg300-28 28-prt gigabit managed switch get Error:

firmware version 1.4.1.03

Upgrade/Backup Firmware/Language

Bytes Transferred:	0
Status:	Copy failed
Error Message:	Illegal software format

I upgrade boot code  first is ok (sx300_boot-13506.rfb)

Please recommend for me thanks.

[Mark Malone]

Reading this you need to go to upgrade to the interim software 1.3.7.18 first

https://supportforums.cisco.com/discussion/12286911/sg300-firmware-upgrade-copy-illegal-software-format

HTH

[ren_rayuth]

thanks you for your reply