What in the world does error code -60008 really mean?

I was trying to trash the TweetDeck software from my system but it stated that an error has occurred which was coded as -60008. I googled for it but there was no such thing as the error code -60008 and I even tried using a website that do searches on all codes for Mac but it doesn't even exist! If it doesn't exist, then how come I get this error code??? Is this a new error code that hasn't had a fix yet or what? Please help me!