deleting a MIDI recording (or last lap) in loop mode.

Hello everyone.

I am optimizing my workflow in cubase 7.5 and can not find another way to solve the following problem.

In the Midi Loop Record mode, I’d find a way to undo the recording when one of the laps I made a mistake but without stopping the recording mode.

Currently, the way I work is:

Grabo in Loop mode.
At every turn I play a percussion instrument, if the decision is continuous good to the next round.
If I fail, pulse * to stop recording if you stop the reproduction and press (Command + z) to undo the error.
Acontinuación recording again (press *)

Is there any way to do this without leaving the recording mode ?. Undo does not work while I’m recording.

Thank you