MATLAB Compiler

Controlling Information in Run-Time Errors

Use the debugline:setting option to include source filenames and line numbers in run-time error messages. The possible values for setting are:

• on
• off

Not specifying any debugline setting uses the default of off, which does not include filenames and line numbers in the generated run-time error messages.

For example, given the M-file, tmmult.m, which in MATLAB would produce the error message Inner matrix dimensions must agree

function tmmult
        a = ones(2,3);
        b = ones(4,5);

        y = mmult(a,b)

function y = mmult(a,b)
        y = a*b;

If you create a Compiler-generated MEX-file with the command

mcc -x tmmult

and run it, your results are

tmmult
??? Inner matrix dimensions must agree.

Error in ==> <matlab>\toolbox\compiler\tmmult.dll

The information about where the error occurred is not available. However, if you compile tmmult.m and use the -A debugline:on option as in

mcc -x -A debugline:on tmmult

your results are

Note    When using the -A debugline:on option, the lasterr function returns a string that includes the line number information. If, in your M-code, you compare against the string value of lasterr, you will get different behavior when using this option. Since try...catch...end is not available in g++, do not use the -A debugline:on option on Linux when generating a C++ application.

Controlling #line Directives in Output Code

Interfacing M-Code to C/C++ Code