Bhimesh,
I've seen this error happen due to a corruption or a wrong file being used to load the symbols; in this case, would you mind checking section 11 of the page below that contains some details about the u-boot debugging process?
http://processors.wiki.ti.com/index.php/Sitara_Linux_Training:_uboot_linux_debug_with_ccsv5
Unfortunately I don't recall other scenarios where this issue happens, but I will check and reply back if I can find anything.
Hope this helps,
Rafael