MATLAB Grader: Learner solution.m missing? No such file or directory.

I have used custom code many times to check my learners have written something exact, e.g.

% Get student code
soln = fileread('solution.m')

% Remove white spaces to standardise
NoSpacesSoln = regexprep(soln,'\s+','');

% check for v(k) defined with various spacings
CheckVk = contains(NoSpacesSoln,'v(k)=')

Today, when selecting Validate Reference Solution or Learner Preview, I get:

Error using fileread (line 23) Could not open file solution.m. No such file or directory.

Using ls I see only SolutionTest.m in both cases too. This file appears to contain:

%% ScoringEngineTestPoint1 
%% ScoringEngineTestPoint2 
%% ScoringEngineTestPoint3

I went back to an older problem set my students are using, and this exact code:

soln = fileread('solution.m')

works fine to get the student solution.

Any idea what’s happening?

Answer 1

[Cris LaPierre]

I can get the same error message if I try to use fileread('solution.m') on a function type problem.

Note that for function type problems, the file name is the same as the function name. Only script-type problems are saved in grader with the name 'solution.m'.

[IFM]

Make sense. I don't often make function type problems so that one slipped my mind!

Brilliant, thank you!