Excel 2007: "There Was A Problem Sending The Command To The Program"

If you have ever tried to open an excel document and received the error that says "There was a problem sending the command to the program", you can fix it by doing the following:

Open Excel 2007
Open the Menu in the top left
Click the "Excel Options" button

Click the advanced tab on the left of the options screen
Under the general options uncheck the box "Ignore other application that use Dynamic Data Exchange (DDE)"