Foam Fatal Error
 

when I am running propeller simulation in open foam using pimpleFoam solver I am facing an error

--------------------------------------------------------------------------
[5]
[5]
[5] --> FOAM FATAL IO ERROR: (openfoam-2312)
[5] No matching cellZones: innerCylinderSmall
Valid zones : ()
Valid groups: ()
[5]
[5]
[5] file: stream at line 0.
[5]
[5] From Foam::zoneMotion::zoneMotion(const Foam::dictionary&, const Foam::polyMesh&)
[5] in file motionSolvers/displacement/displacement/zoneMotion.C at line 90.
[5]
FOAM parallel run exiting


how I can resolve this error,
thanks in advance

Have you tried ... reading the error message?

first I am an absolute beginner in openfoam and I found that there is no cell zone in constant/polyMesh/cell zone, how do I add that