Game Launcher Mishaps

Hi there, I have a question to the game launcher for the Sims 3, Whenever  I play the game it shows this message that goes like this : "There was an Error During Startup, Please see the Log for more details" I don't know what this means since I've played the game plenty of times, no lag or anything minor nor major, this is my only real problem I've had, please reply, thanks.