Failed to set core voltage! Can't set CPU frequency

[Yerd]

Hi! I am working with A13-SOM kernel Debian 3.4.103+. I was in FileSystem and suddenly appears this message in the console:

U-Boot SPL 2014.04-10729-gd86884d-dirty (Oct 04 2014 - 00:34:24)
Board: A13-OLinuXino
DRAM: 512 MiB
Failed to set core voltage! Can't set CPU frequency

After, I reseted many times the board and it booted OK. Is it a problem with de power VCC? I am using 3.3V from a regulator module.