Does anybody know what this error means? Clicking the link in the warning message gives a "page not found", and Googling does not produce anything for this exact error code. I get it whenever I try to save a .m file. If, after saving for the first time, I try to save it again, Mathematica complains that the file has changed outside of M. If, however, I close the window and open the .m file again, all is good.
OS X 10.9, Mathematica 10.0.2.0
INTERNAL SELF-TEST
errors from time to time, this usually clears it up support.wolfram.com/kb/12464 so I've never taken the time to figure out exactly what they mean. $\endgroup$