I am having troubles with excel 2011. I have an excel document i made on excel 2010 on a PC that i sent over to my new MBA. Every time I open this file, I get a dialog box saying that budget.xlsx is already open and that reopening will cause any changes to be discarded. Also, every time I close the excel, it prompts me to save changes, even if i immediately exit after opening the excel. i make no changes at all. and i did some research and read about certain volatile functions. and there are not any crazy functions at all besides sum, average, subtraction, etc. thanks for your help!