diff --git a/src/util.py b/src/util.py
index b0890bc..54421e3 100644
--- a/src/util.py
+++ b/src/util.py
@@ -25,7 +25,7 @@
 #   scemama@irsamc.ups-tlse.fr
 
 import os
-NTHREADS=int(os.getenv('OMP_NUM_THREADS',2))
+NTHREADS=1 #int(os.getenv('OMP_NUM_THREADS',1))
 
 def strip(x):
   return x.strip()
diff --git a/src/version.py b/src/version.py
index e69e13e..414119a 100644
--- a/src/version.py
+++ b/src/version.py
@@ -1 +1 @@
-version = "1.2.8"
+version = "1.2.9"