[hiccup]

Hi I am beginner of OpenFoam. And I am using OpenFoam2.3.1.
I'm trying to solve basic icoFoam Problem. BlockMEesh, surfaceFeatureExtract, snappyHexMesh, and icoFoam work very well. BUt error comes up when i try to see result on the praview. When i press apply and play button, this happens

FOAM FATAL IO ERROR: 
size 4000 is not equal to the given value of 59676

file: /home/openfoam/shared_folder/2shot/0.22/p from line 18 to line 4051.

    From function Field<Type>::Field(const word& keyword, const dictionary&, const label)
    in file /home/openfoam/OpenFOAM/OpenFOAM-2.3.1/src/OpenFOAM/lnInclude/Field.C at line 292.

FOAM exiting

These are my cods that i use

FoamFile
{
    version     2.0;
    format      ascii;
    class       volVectorField;
    object      U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{
  inlet
    {
        type            fixedValue;
        value           uniform (27.7 0 0);
    }
    outlet
    {
        type            zeroGradient;
    }
    back
    {
        type            slip;
    }
    sky
    {
	type	slip;
    }
    front
    {
        type            slip;
    }
	bottom
    {
        type             slip;
    }
	carGroup
    {
        type            fixedValue;
	value           uniform (0 0 0);
    }
}

FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
    object      p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 2 -2 0 0 0 0];

internalField   uniform 0;

boundaryField
{
     inlet
    {
        type            zeroGradient;
    }
    outlet
    {
        type           fixedValue;
	value uniform 0;
    }
    back
    {
        type            zeroGradient;
    }
    sky
    {
	type	zeroGradient;
    }
    front
    {
        type            zeroGradient;
    }
	bottom
    {
        type           zeroGradient;
    }
	carGroup
    {
        type            zeroGradient;
    }
}

FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //


convertToMeters 1;

vertices        
(
    (0 0  0)
    (2 0  0)
    (2  0.7 0)
    (0  0.7 0)
    (0 0 0.3)
    (2 0  0.3)
    (2 0.7 0.3)
    (0 0.7 0.3)
);

blocks          
(
    hex (0 1 2 3 4 5 6 7) (40 10 10) simpleGrading (1 1 1)
);

edges           
(
);

boundary
(
    inlet
    {
        type patch;
        faces
        (
            (0 4 7 3)
        );
    }
    outlet
    {
        type patch;
        faces
        (
            (1 2 6 5)
        );
    }
    back
    {
        type wall;
        faces
        (
            (0 3 2 1)
        );
	}
	sky
	{
	type wall;
	faces
	(
	(3 7 6 2)
	);
	}
 
    front
    {
        type wall;
        faces
        (
            (4 5 6 7)
        );
    }
    bottom
    {
        type wall;
        faces
        (
            (0 1 5 4)
        );
    }
);

mergePatchPairs 
(
);

I can do nothing because of this problem. I deleted every block files or result files but it doesn't work.