Hi,
I am working on our custom board with dunfell version and we are using a
custom u-boot for the board. But when i try to use fw_printenv and
fw_setenv iam not being able to access those functionalities. Iam using
libubootenv for those specific functionalities .

iam adding libubootenv-bin in image_install and iam getting the fw_printenv
and fw_setenv in the /usr/bin folder

But when i use fw_printenv and fw_setenv iam getting an error,
Can't read from default
Can't read from file.

We are storing the environment variables in the spi flash /dev/mtd3

When i try hexdump i can find the variables present
But iam not being able to access it with fw_printenv and fw_setenv any
variable using fw_setenv

I should mention that fw_env.config is perfect and does not have any error
in it, because when we try to access those variables using another
fw_printenv, which we got from executing make in the git source , we are
getting the variables printed.

Also during build of the u-boot we are using a patch file which we got from
internet for its build succession, I dont know whether that patch
interferes with anything that hinders its function.

Iam attaching my fw_env.config and also the patch file i used for u-boot
along with this

As iam a beginner in this field, Iam not much aware of these
functionalities in detail. Please look in to the issue and any helps are
appreciated.

Regards,
*Vipin*