diff --git a/.gitignore b/.gitignore
index 5c59f40..dd30e97 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 *DS_Store
 
 *.m~
+*.asv
 *octave-workspace
 
 # exclude content of logfiles folders
diff --git a/initEnv.m b/initEnv.m
index e135df6..c59cc15 100644
--- a/initEnv.m
+++ b/initEnv.m
@@ -15,7 +15,7 @@
 function initEnv
 
     octaveVersion = '4.0.3';
-    matlabVersion = '9.2.0';
+    matlabVersion = '9.1.0';
 
     if isOctave
 
@@ -77,7 +77,7 @@
     persistent cacheval   % speeds up repeated calls
 
     if isempty (cacheval)
-        cacheval = (exist ("OCTAVE_VERSION", "builtin") > 0);
+        cacheval = (exist ('OCTAVE_VERSION', 'builtin') > 0);
     end
 
     retval = cacheval;
@@ -86,7 +86,7 @@
 function addDependencies()
 
     pth = fileparts(mfilename('fullpath'));
-    addpath(fullfile(pth, 'lib', 'CPP_BIDS', 'src'));
+    addpath(genpath(fullfile(pth, 'lib', 'CPP_BIDS', 'src')));
     addpath(fullfile(pth, 'lib', 'CPP_PTB'));
     addpath(genpath(fullfile(pth, 'lib', 'CPP_PTB', 'src')));
     addpath(fullfile(pth, 'subfun'));
diff --git a/lib/CPP_PTB b/lib/CPP_PTB
index 56b44dd..8c25300 160000
--- a/lib/CPP_PTB
+++ b/lib/CPP_PTB
@@ -1 +1 @@
-Subproject commit 56b44dde23db03cd9d77165231bbf74e9388930e
+Subproject commit 8c253007d4ce30c9c1a5f97dbbe9b0a93c59d0ca