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Bistrol
Bistrol
New Member
November 21, 2025
Question

FGT - 1000F Upgrade failed : "File is not an update file"

  • November 21, 2025
  • 2 replies
  • 396 views

Hi,

 

I must upgrade a Fortigate 1000F from 7.2.10 to 7.4.8.

I receive an error that i've never seen : "File is not an update file".

I'v verified checksum of the file.

I've got the same error when i try to upload the file directly to the gui and if i try the upgrade with fortiguard servers.
The support team send me a firmware image to compare with the file i've downloaded and the files are exactly the same.

 

Has anyone ever encountered this problem?

Thanks
Simon

2 replies

Atul_S
Staff & Editor
Atul_S
Staff & Editor
November 21, 2025

Hi Simon,

 

It may be because the file type is unexpected. It does happen sometimes due to a few file-handling methods used in the backend for zip/cache/browser modifications, etc.

AEK
SuperUser
AEK
SuperUser
November 23, 2025

Hi Simon

Please share the filename you downloaded.

And the command "get sys status" from your FGT (you can hide the SN).

AEK
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