diff --git a/src/sampling/sampledSurface/sampledSurfaces/sampledSurfaces.C b/src/sampling/sampledSurface/sampledSurfaces/sampledSurfaces.C
index c480ec3..051e440 100644
--- a/src/sampling/sampledSurface/sampledSurfaces/sampledSurfaces.C
+++ b/src/sampling/sampledSurface/sampledSurfaces/sampledSurfaces.C
@@ -217,7 +217,20 @@ void Foam::sampledSurfaces::read(const dictionary& dict)
     {
         dict.lookup("fields") >> fieldSelection_;
 
-        dict.lookup("interpolationScheme") >> interpolationScheme_;
+        if(dict.found("interpolationScheme"))
+        {
+            dict.lookup("interpolationScheme") >> interpolationScheme_;
+        }
+        else
+        {
+            WarningIn("sampledSurfaces::read(const dictionary& dict)")
+                << "'interpolationScheme' is not defined in: " << nl
+                << "      " << dict.name() << nl
+                << "    "
+                << "It is only required for when interpolating volume fields."
+                << endl;
+        }
+
         const word writeType(dict.lookup("surfaceFormat"));
 
         // define the surface formatter

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.1.x                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    location    "system";
    object      controlDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

application     interDyMFoam;

startFrom       startTime;

startTime       0;

stopAt          endTime;

endTime         40;

deltaT          0.01;

writeControl    adjustableRunTime;

writeInterval   0.05;

purgeWrite      0;

writeFormat     ascii;

writePrecision  6;

writeCompression compressed;

timeFormat      general;

timePrecision   6;

runTimeModifiable yes;

adjustTimeStep  yes;

maxCo           0.5;
maxAlphaCo      0.5;

maxDeltaT       1;

functions
{
    probes
    {
        type            probes;
        functionObjectLibs ("libsampling.so");
        outputControl   outputTime;
        probeLocations
        (
            ( 0 9.95 19.77 )
            ( 0 -9.95 19.77 )
        );
        fields
        (
            p
        );
    }

    wallPressure
    {
        type            surfaces;
        functionObjectLibs ("libsampling.so");
        outputControl   outputTime;
        surfaceFormat   raw;
        //interpolationScheme isThisNeeded;
        fields
        (
            p
        );

        surfaces
        (
            walls
            {
                type        patch;
                patches     (walls);
                triangulate false;
            }

//             nearWalls_interpolated
//             {
//                 type            patchInternalField;
//                 patches         ( "walls" );
//                 interpolate     true;
//                 offsetMode  normal;
//                 distance    0.1;
//             }
        );
    }
}


// ************************************************************************* //