Your recovery partition has become corrupted. It's pretty easy to address. You can find Philz recovery in a tar format in the dev threads on here, which you then flash through ODIN, and you'll be able to continue rooting or whatever you were doing in the first place.
NookColor: CM7 Nightly 221 , OC@ 1300MHz
HP Touchpad: WebOS 3.0.4 OC@ 1.5GHz(for now), CM9 20120707 OC @ 1.5GHz
Sprint LG-LS670 CM7 Retired
T-mobile LG-P500 CM7
Sprint Galaxy S4 Surprisingly stock, but rooted and rolling the hotspot mod
(2) Nook HD+: Stock, as it belongs to the kids, and has the play store