mex not reloaded due to existing references (was "clear mex" in octave?")

[José Vallet]

Hello all.

I have a problem with mex files. In short:
-Create a mex file, compile it and execute it
-Modify it A and recompile.
-Try executing the new version, octave will execute the old one and 
warns: "mex not reloaded due to existing references"

clean mex does not solve the problem.

Browsing around I found this old post
http://octave.1599824.n4.nabble.com/quot-clear-mex-quot-in-octave-td1634521.html
in which this is described as a bug with a fix expected in Octave 3.2. I 
am using 3.4.2 and still have the same problem.

Could it be that the fix did not go through?
Otherwise, how to reload mex files without restarting octave?

BR
Jose V.