U-Boot Bootup error

I'm running a Debian Linux on a Cubietruck, running off a SD card.

When I power on, I get the following error:

Booting kernel from Legacy Image at 46000000 ... Image Name: Linux-3.4.105+

Image Type: ARM Linux Kernel Image (uncompressed)

Data Size: 5359176 Bytes = 5.1 MiB

Load Address: 40008000

Entry Point: 40008000

Verifying Checksum ... OK

ERROR: Did not find a cmdline Flattened Device Tree

Could not find a valid device tree

reading boot.scr

** Unable to read file boot.scr ** Failed to mount ext2 filesystem...

** Unrecognized filesystem type ** Failed to mount ext2 filesystem...

** Unrecognized filesystem type ** Failed to mount ext2 filesystem...

** Unrecognized filesystem type ** reading script.bin

46240 bytes read in 30 ms (1.5 MiB/s)

reading uImage

5359240 bytes read in 274 ms (18.7 MiB/s)

Booting kernel from Legacy Image at 48000000 ... Image Name: Linux-3.4.105+

Image Type: ARM Linux Kernel Image (uncompressed)

Data Size: 5359176 Bytes = 5.1 MiB

Load Address: 40008000

Entry Point: 40008000

Verifying Checksum ... OK

Loading Kernel Image ... OK

Starting kernel ...

The system does eventually boot, but it seems like it first tries to read from boot.src, but then somehow finds the correct image file and boots fine.

I just want to remove this error. Could somebody please elaborate?