This enhancement has been incorporated in Release 2010b (R2010b). For previous product releases, read below for any possible workarounds:
To reenable M-Lint for a MATLAB file:
1. In the Editor, reopen the file that you were editing when MATLAB terminated.
2. Remove the lines of code that you believe M-Lint could not handle.
3. Delete the MLintFailureFiles file from your preferences directory. (The preferences directory is the directory that MATLAB returns when you run the function PREFDIR).
4. Save and reopen the MATLAB file.