ICOM wont update to 04-25-42

[see_you_33]

I bought a genuine ICOM new from the dealer. It was a fresh unit that was still in firmware mode. So the first thing I did was update to the latest BMW_ISPI_ICOM-Next-FW_04-25-42.msi from BMW. Update of rootfs via the web interface failed with a signature check error. Tried again with another copy of from this forum and same result.

Update to 04-25-21 was successful though and the ICOM works normally, but updating from 04-25-21 to 04-25-42 fails with the same signature check error. Some Googling and a single report from another forum suggests a intermediate update to 04-25-32 is required and jumping straight to -42 is not possible. Does anyone know more details about this?

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