[RishabhG]

I have created a mesh using gmsh. When I run

gmshToFoam Gasifier.msh -case case

I get the following. Please Help
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 4.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
Build : 4.0
Exec : gmshToFoam Gasifier.msh -case case
Date : Jan 13 2017
Time : 04:35:24
Host : "rishabh-HP-15-Notebook-PC"
PID : 10009
Case : ./case
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Allowing user-supplied system call operations

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

Starting to read mesh format at line 2
Read format version 2.2 ascii 0

Starting to read physical names at line 5
Physical names:6
Surface 1 Inlet
Surface 2 Outlet
Surface 3 Wall1
Surface 4 Wall2
Surface 5 Wedge1
Surface 6 Wedge2

Starting to read points at line 14
Vertices to be read:2633
Vertices read:2633

Starting to read cells at line 2650
Cells to be read:4923

Mapping region 5 to Foam patch 0
Mapping region 4 to Foam patch 1
Mapping region 3 to Foam patch 2
Cells:
total:0
hex :0
prism:0
pyr :0
tet :0



--> FOAM FATAL IO ERROR:
No cells read from file "Gasifier.msh"
Does your file specify any 3D elements (hex=5, prism=6, pyramid=7, tet=4)?
Perhaps you have not exported the 3D elements?

file: Gasifier.msh at line 7575.

From function void readCells(Foam::scalar, bool, const pointField&, const Foam::Map<long int>&, Foam::IFstream&, Foam::cellShapeList&, Foam::labelList&, Foam::List<Foam:ynamicList<Foam::face> >&, Foam::labelList&, Foam::List<Foam:ynamicList<long int> >&)
in file gmshToFoam.C at line 726.

FOAM exiting

[Jack80]

It seems to me like you don't have any 3D cell.

Did you correctly define a 3D mesh in gmsh? Maybe you didn't extrude?