FW update error E: Image in the secondary slot is not valid!

[Jithin A]

Hi, I have integrated MCUBoot to my application and I see the below error every time on device reset.

E: Image in the secondary slot is not valid!

Below are my prj.conf flags setup

CONFIG_BOOTLOADER_MCUBOOT=y
CONFIG_SECURE_BOOT=y
CONFIG_SB_SIGNING_KEY_FILE="priv_key.pem"
CONFIG_DFU_TARGET=y
CONFIG_IMG_MANAGER=y
CONFIG_DFU_TARGET_MCUBOOT=y
CONFIG_DFU_TARGET_STREAM=y
CONFIG_STREAM_FLASH_ERASE=y
CONFIG_STREAM_FLASH=y
CONFIG_B0_MIN_PARTITION_SIZE=y
CONFIG_NRF53_UPGRADE_NETWORK_CORE=n

I am using NRF Connect SDK v2.2.0 and my target board is nRF5340-DK

Please guide me what I am doing wrong, thank you in advance

Please let me know if any information is nedded.

[Sigurd]

Hi,

I am using NRF Connect SDK v2.2.0

1) Do you see the same with v2.4.0 ?

2) Did you try to do a DFU ?

[Jithin A]

Hi Sigurd, thank you for the quick response.

 Below are my comments

1) Do you see the same with v2.4.0 ?

—> We haven’t tried it on v2.4.0.

2) Did you try to do a DFU ?

—> Yes, we did.

—> I am sorry for not mentioning this, we observe this error after we do DFU and reset the device.

 It was working well earlier and we were trying something with kconfig to reduce the update bin size and this happened.

We do not know what we messed up.

[Jithin A]

Hi, any updates on this.

 Please help me with this.

[Sigurd]

Hi,

Jithin A said:

 It was working well earlier and we were trying something with kconfig to reduce the update bin size and this happened.

So DFU was working before?

Do you have the previous build folder? Maybe you can compare the new and old .config files from the build folder?

Also, do you have the full log where this "E: Image in the secondary slot is not valid!" is printed?

[Jithin A]

Sigurd said:

So DFU was working before?

Yes.

Sigurd said:

Do you have the previous build folder? Maybe you can compare the new and old .config files from the build folder?

I might have this, let me check and get back to you.

Thank you for the response.

[Jithin A]

Thank you, Sigurd.

I had a copy in my backup and after replacing with the old file it is working.

Thank you for the support.