hi, when i calculate my case,
 

hi,
when i calculate my case,it show some errors:
Exec : turbFoam /home/ivan/OpenFOAM/ivan-1.4.1/run/tutorials/turbFoam case1
Date : Oct 14 2008
Time : 09:23:25
Host : linux-pasm
PID : 15342
Root : /home/ivan/OpenFOAM/ivan-1.4.1/run/tutorials/turbFoam
Case : case1
Nprocs : 1
Create time
Create mesh for time = 0
Reading field p
Reading field U
Reading/calculating face flux field phi
Selecting incompressible transport model Newtonian
Selecting turbulence model kEpsilon
Starting time loop
Time = 0.002
Courant Number mean: 0 max: 0.00444444

--> FOAM FATAL ERROR :
gradientInternalCoeffs cannot be called for a defaultFvPatchField (actual type BoundaryU)
on patch inlet of field U in file "/home/ivan/OpenFOAM/ivan-1.4.1/run/tutorials/turbFoam/case1/0/U"
You are probably trying to solve for a field with a default boundary condition.
From function defaultFvPatchField<type>::gradientInternalCoeffs( ) const
in file fields/fvPatchFields/basic/default/defaultFvPatchField.C at line 694.
FOAM exiting.
i have writed new boundary condition in my case.
what is the problem?can someone give me a hint?