Force Coefficients fioe flow over cylinder in openfoam
 

I am trying to solve the flow over cylinder using mhdFoam solver in openFoam. When i am including the force coefficient script in the controlDict file as follows:
functions
{
forceCoeffs
{
type forceCoeffs;
functionObjectLibs ( "libforces.so" );
writeControl timeStep;
writeInterval 100;

patches ( "cylinder" );
pName p_rgh;
UName U;
rho rhoInf;
log true;

liftDir (0 1 0);
dragDir (1 0 0);
CofR (0 0 0);
pitchAxis (0 0 1);

magUInf 1;
rhoInf 1;
lRef 1.0; // Diameter of Cylinder.
Aref 1; // Projected Area = Diameter * Length of Cylinder.
// Note for 2D cylinder flow Length is size of mesh in Z-direction (usually taken as unity)
}
}

when i am running, the following error is coming:
--> FOAM FATAL IO ERROR:
wrong token type - expected word, found on line 19 the punctuation token '['

file: /home/AMRITAVIDYA/p2tf17008/Desktop/mhdFlow/cylinder_mhdFoam/TRAIL/constant/transportProperties.nu at line 19.

From function Foam::Istream& Foam::operator>>(Foam::Istream&, Foam::word&)
in file primitives/strings/word/wordIO.C at line 74.

FOAM exiting

Can some one help me with is error???
Thanks in advance.

Its not "cylinder" but cylinder without the "