diff --git a/tutorials/sphereGranFlow/binarySystemOfParticles/caseSetup/interaction b/tutorials/sphereGranFlow/binarySystemOfParticles/caseSetup/interaction
old mode 100644
new mode 100755
index 9e154f4c..6593ff8b
--- a/tutorials/sphereGranFlow/binarySystemOfParticles/caseSetup/interaction
+++ b/tutorials/sphereGranFlow/binarySystemOfParticles/caseSetup/interaction
@@ -6,47 +6,47 @@ objectName  interaction;
 objectType  dicrionary;
 fileFormat  ASCII;
 /*---------------------------------------------------------------------------*/
-materials      (prop1);                          // properties of material
+materials     (prop1);          // properties of material
 
-densities      (1000.0);                         // density of materials [kg/m3]
+densities     (1000.0);         // density of materials [kg/m3]
 
-contactListType   sortedContactList;
+contactListType     sortedContactList;
 
 contactSearch
 {
   
-   method         NBS;                           // method for broad search 
+   method          NBS;          // method for broad search 
     
-   updateInterval 10;
+   updateInterval   10;
 
-   sizeRatio      1.1;
+   sizeRatio       1.1;
 
    cellExtent     0.55;
 
-   adjustableBox  Yes;
+   adjustableBox   Yes;
 } 
 
 model
 {
-   contactForceModel nonLinearNonLimited;
+   contactForceModel     nonLinearNonLimited;
 
-   rollingFrictionModel normal;
+   rollingFrictionModel               normal;
 
    // Property (solid-solid Properties)
 
-   Yeff  (1.0e6);                                // Young modulus [Pa]
+   Yeff     (1.0e6);          // Young modulus [Pa]
 
-   Geff  (0.8e6);                                // Shear modulus [Pa]
+   Geff     (0.8e6);          // Shear modulus [Pa]
 
-   nu    (0.25);                                 // Poisson's ratio [-]
+   nu       (0.25);           // Poisson's ratio [-]
 
-   en    (0.7);                                  // coefficient of normal restitution
+   en       (0.7);            // coefficient of normal restitution
 
-   et    (1.0);                                  // coefficient of tangential restitution 
+   et       (1.0);            // coefficient of tangential restitution 
 
-   mu    (0.3);                                  // dynamic friction 
+   mu       (0.3);            // dynamic friction 
 
-   mur   (0.1);                                  // rolling friction     
+   mur      (0.1);            // rolling friction     
 }