My co-worker she just runs the SAS program I developed. Recently strange things are happening with it which never happens with me. She would tell me that some information doesn't get picked up. When I run the information does get picked up. Also asterisk would appear so instead of showing date of birth in the data set at 2011-12-12 it would display as *********. This program have been developed over 2 yrs so it isn't a new program but I do revise it sometimes but nothing major. The first scenerio isn't important. For the asterisk part I would revise the code over and over but after the date finally appears the code looks exactly the same as what I wrote before so basically I didn't change anything. Plus this particular code have been ran correctly for the past few months.