diff --git a/Inputs/DetectorConfiguration/e644.detector b/Inputs/DetectorConfiguration/e644.detector
old mode 100755
new mode 100644
diff --git a/NPTutorials/cats/README.txt b/NPTutorials/cats/README.txt
index b92ff7d22f51cd10f0b8fc6aa592d4ec1922bd68..99e55339514887d004869671f2a95c32f5dda994 100644
--- a/NPTutorials/cats/README.txt
+++ b/NPTutorials/cats/README.txt
@@ -1,7 +1,7 @@
 1- Compile program by doing in command line: make
 
 2- Type the following command line to execute the code:
-  ./Analysis -D e644.detector -R RunToTreat.txt -C calibation.txt
+  ./Analysis -D e644.detector -R RunToTreat.txt -C calibration.txt
 
 3- To see the result of tha analysis, launch root and execute the macro ShowResult.C
   .x ShowResult.C