I'm having a weird problem in my copy of MATLAB at work (22.214.171.124709 Release 13 SP1). Originally I was having a problem with naming a file "any.m" as it wouldn't run. So I named it anyd.m and no problem afterward and I just assumed that word was some sort of script or something already defined in the program. Well now here's the kicker. I need to put a date in my filename now and I can't or can (really weirdly) get the files to run. Here's a few examples of filenames and what happens when they run. 4 1 2008.m FAC 4 1 2008.m 4-1-2008.m (that's the really weird one) test1m.m File runs and displays my plot as it should What's causing this? I have no problems naming files whatever I please on my home computer, though it is running a newer version than here at work.