I am trying to get MediaLab to run a program called Arena.exe that needs to open a .def file that I have created which specifies parameters for a virtual maze. What do I put in "file name" in a questionnaire file to make this happen? Also, the Arena program produces a .dat file with variable names as column headings and trial names as rows. This file writes over itself for each new participant. How do I get data for several variables from different trials for each participant into the MediaLab data files? If it is any help, information about the Arena program can be found at http://web.arizona.edu/~arg/data.html Thanks much!