This looks like your first eMMC partition (MyDocs) is not valid fat, ext2 or ext4. Some Windows and Linux systems using some fat extension which is not supported by u-boot, so then u-boot cannot read bootmenu file from MyDocs.
You need to (re)format MyDocs partition from Maemo (to be sure that you use correct format) to one support filesystem (fat, ext2 or ext4).