diff --git a/libs/cocosimLibs.slx b/libs/cocosimLibs.slx
index 5913da04..b9bf4fef 100644
Binary files a/libs/cocosimLibs.slx and b/libs/cocosimLibs.slx differ
diff --git a/libs/contractLibs.slx b/libs/contractLibs.slx
index 63491092..2a7594b3 100644
Binary files a/libs/contractLibs.slx and b/libs/contractLibs.slx differ
diff --git a/scripts/install_cocosim_lib.m b/scripts/install_cocosim_lib.m
index 631c6cca..d867bc48 100644
--- a/scripts/install_cocosim_lib.m
+++ b/scripts/install_cocosim_lib.m
@@ -224,8 +224,9 @@ function copyCoCoFiles(force, cocosim_path)
             fprintf('copyfile failed:\n%s \n', MESSAGE);
         end
     end
-    %delete old cocosim_pp
+    %delete redundant files
     delete(fullfile(cocosim_path, 'src', 'frontEnd', 'pp', 'std_pp', 'cocosim_pp.m'));
+    delete(fullfile(cocosim_path, 'libs', 'contract', 'slblocks.m'));
     
     %add path the new folder
     addpath(genpath(cocosim_path));