--- a/+mpm/check.m	Mon Sep 10 16:35:17 2018 +0200
+++ b/+mpm/check.m	Mon Sep 10 16:54:29 2018 +0200
@@ -4,9 +4,13 @@
 %
 % Useful to put at the top of some scripts
 function check()
+    if ~exist('d', 'var') || isempty(d)
+        d = '';
+    end
+
     folders = split(path(), pathsep);
 
-    sp = mpm.subpaths();
+    sp = mpm.subpaths(d);
     for i = 1:length(sp)
         if ~isAtTop(sp{i}, fullfile(pwd, sp{i}), folders)
             error('Subpaths are not correctly set. Try running mpm.set()');