Byte Stream Type on Audition

I saved a file that I was working on last night in Adobe Audition, but when I went to open it this morning (going to File -> Open Recent) an error message popped up saying "Error: Media Foundation reported an error when opening the file. The byte stream type of the given URL is unsupported." It doesn't seem like it should be due to an older version of Adobe, because I was just working on the file yesterday. I'd appreciate any help/suggestions people would give. Thanks -- Jake