[sajad6]

HI
I modify wallHeatFlux utility and make NusseltCalc utility with Johan Magnusson presentation.When I want to use utility in hotroom tutorial I see this error in terminal:

sajad@sajad-pc:~/Desktop/hotRoom$ NusseltCalc
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 1.5-dev |
| \\ / A nd | Revision: exported |
| \\/ M anipulation | Web: http://www.OpenFOAM.org |
\*---------------------------------------------------------------------------*/
Exec : NusseltCalc
Date : Oct 21 2014
Time : 23:48:43
Host : sajad-pc
PID : 3697
Case : /home/sajad/Desktop/hotRoom
nProcs : 1

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 0

Time = 0
Selecting thermodynamics package hThermo<pureMixture<constTransport<specieThermo<hC onstThermo<perfectGas>>>>>


keyword top is undefined in dictionary "/home/sajad/Desktop/hotRoom/0/T::boundaryField"

file: /home/sajad/Desktop/hotRoom/0/T::boundaryField from line 25 to line 439.

From function dictionary::subDict(const word& keyword) const
in file db/dictionary/dictionary.C at line 271.

FOAM exiting

where is my problem?
tnx for any help