diff --git a/src/STEMMUS_SCOPE.m b/src/STEMMUS_SCOPE.m
index 515d7b3e..c576eebf 100644
--- a/src/STEMMUS_SCOPE.m
+++ b/src/STEMMUS_SCOPE.m
@@ -23,11 +23,12 @@
     pkg load statistics io;
 end
 
-% Read the configPath file. Due to using MATLAB compiler, we cannot use run(CFG)
-global CFG
-if isempty(CFG)
+% set CFG to a path if it is not defined
+if exist('CFG','var') == 0
     CFG = '../config_file_crib.txt';
 end
+
+% Read the configPath file. Due to using MATLAB compiler, we cannot use run(CFG)
 disp (['Reading config from ', CFG]);
 [InputPath, OutputPath, InitialConditionPath] = io.read_config(CFG);