Bianca,

As mentioned before, the data only gets written at the end of a MediaLab session, so there isn't any way to save responses until all of the files in the .exp file for a session are run.
...

MediaLab only creates output files once the .exp file started during a MediaLab session is run to completion. It also only records data for any .que files in the .exp file if the .exp file is run...