Last error message.
LASTERR, by itself, returns a string containing the last
error message issued by MATLAB.
LASTERR('') resets the LASTERR function so that it will
return an empty matrix until the next error is encountered.
LASTERR is usually used in conjunction with the two
argument form of EVAL : EVAL ('try','catch'). The 'catch'
action can examine the LASTERR string to determine the
cause of the error and take appropriate action.
See also EVAL184MKU2, ERROR .