diff --git a/CHANGES.txt b/CHANGES.txt
index ec9aa2d..fa5f0b0 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,8 @@
+
+v1.4.2
+----------------
+use pyasp-1.3.3
+
 v1.4.1
 ----------------
 use pyasp-1.3.1
diff --git a/README b/README
index 761cfc4..891ab73 100644
--- a/README
+++ b/README
@@ -12,7 +12,7 @@ Usage
 Typical usage is::
 	
 	$ shogen.py [options] genomefile metabolismfile catalysationfile queries
-	
+
 	Options:
 	  -h, --help   show this help message and exit
 	  -k K, --k=K  Number of ranked  shortest genome segments (Default to 5)
diff --git a/shogen.py b/shogen.py
index 2e58d17..f8adf3c 100644
--- a/shogen.py
+++ b/shogen.py
@@ -54,7 +54,7 @@
     print "done."
 
     inst=instance.to_file()
-    instance.to_file("inst.lp")
+    #instance.to_file("inst.lp")
     print "create instance ...",
     ksip_instance = query.get_ksip_instance(inst,length)
     print "done.",len(ksip_instance)