MATLAB Function Reference

lasterror

Return last error message and related information

Syntax

• s = lasterror
  s = lasterror(err)
  

Description

s = lasterror returns a structure, s, containing information about the last error issued by MATLAB. The return structure contains the following character array fields.

Fieldname	Description
message	Text of the error message
identifier	Message identifier of the error message

Note    The lasterror return structure may contain additional fields in future versions of MATLAB.

If the last error issued by MATLAB had no message identifier, then the message_id field is an empty character array.

See Message Identifiers in the MATLAB documentation for more information on the syntax and usage of message identifiers.

s = lasterror(err) sets the last error information to the error message and identifier specified in the structure, err. Subsequent invocations of lasterror or lasterr return this new error information. The optional return structure, s, contains information on the previous error.

The fields of the structure, err, are shown in the table above. If either of these fields is undefined, MATLAB uses an empty character array instead.

Example

lasterror is usually used in conjunction with the rethrow function in try-catch statements. For example:

• try
     do_something
  catch
     do_cleanup
     rethrow(lasterror)
  end
  

See Also

error, rethrow, try, catch, lasterr, lastwarn

lasterr

lastwarn