"parameter is invalid, please check!" message during uboot flushing

[inisider]

Hi there,

I am trying to flash luckfox pico plus using the following command but getting an error:

$sudo upgrade_tool di -uboot <...>/luckfox-pico/output/image/uboot.img
Using <...>/luckfox-pico/tools/linux/Linux_Upgrade_Tool/config.ini
parameter is invalid,please check!

It isn't really clear which parameter is invalid and how to check that. I checked that uboot.img exists and have a proper permissions:

ls -la <...>/luckfox-pico/output/image/uboot.img 
-rw-r--r--. 1 root root 262144 Jan 11 17:06 <...>/luckfox-pico/output/image/uboot.img

Could someone provide me any pointers?

[luckfox-eng33]

Why not use ./rkflash.sh uboot?

[inisider]

@luckfox-eng33: I tried that before and it does't change result:

 $ ./rkflash.sh uboot
flash uboot: /run/media/ok/blue_disk/Projects/luckfox-pico/output/image/uboot.img
Using /run/media/ok/blue_disk/Projects/luckfox-pico/tools/linux/Linux_Upgrade_Tool/config.ini
parameter is invalid,please check!