{Eric; hitting "go" then causes your program to output a file containing the pair ups I need to run IREX. You should create a text file which looks like this. Note that it's formatted. The variable is in columns 1-10, the comparison is in columns 11-20, and the check is in columns 21-30. If allsky, then enter 'allsky' in lower case letters in col 11-20. If no check star for that star, then enter 'none' in lower case.