Adding a new function to engine - Help needed

#include "platform/platform.h"
#include "scene/simPath.h"
#include "T3D/navigation/NavMesh.h"
#include "console/engineAPI.h"

//S32 findNavPath(NavMesh *nm,Point3D start, Point3D end, int mode);
DefineEngineFunction( findNavPath, S32, (NavMesh *nm,Point3D start, Point3D end, int mode),,
   "@brief Gets the navigation path between two points.nn"
   "@param nm NavMesh.n"
   "@param start The position to start the path from.n"
   "@param end The position to end the path at.n")
{
	if (nm)
	{
		Sample* sample=nm->sample;

		if(sample)
		{
			PathMode pm;
			if (mode == 0)
				pm = PATHMODE_STRAIGHT;
			else if (mode == 1)
				pm = PATHMODE_FOLLOW;
			else if (mode == 2)
				pm = PATHMODE_SLICED;
			else
				pm = PATHMODE_STRAIGHT;

			float spos[3];
			float epos[3];
			spos[0] = start.x;
			spos[1] = start.z;
			spos[2] = -start.y;
			epos[0] = end.x;
			epos[1] = end.z;
			epos[2] = -end.y;

			sample->setPath(new NavMeshPath);

			sample->handlePath(spos, epos, pm);

			float* path = NULL;
			int numPoints = 0; 
			if(pm == PATHMODE_FOLLOW)
			{
				numPoints = sample->getPath()->getNumSmoothPath();
				path = sample->getPath()->getSmoothPath();
			}
			else if(pm == PATHMODE_STRAIGHT || pm == PATHMODE_SLICED)
			{
				numPoints = sample->getPath()->getNumStraightPath();
				path = sample->getPath()->getStraightPath();
			}

			Path* NavPath=new Path();
			for(int i = 0; i < numPoints; ++i)
			{
				Marker* mk=new Marker();
				mk->mSeqNum=i;
				Point3D pos;
				pos.x=path[i*3];
				pos.y=-path[i*3+2];
				pos.z=path[i*3+1];
				mk->setPosition(pos);
				NavPath->addObject(mk);
			}
		}
		return NavPath->getID();
	}

	return -1;
}

DefineEngineFunction( findNavPath, S32, (NavMesh *nm,Point3D start, Point3D end, int mode),,  
   "@brief Gets the navigation path between two points.nn"  
   "@param nm NavMesh.n"  
   "@param start The position to start the path from.n"  
   "@param end The position to end the path at.n")

DefineConsoleFunction( quitWithErrorMessage, void, ( const char* message ),,
   "Display an error message box showing the given @a message and then shut down the engine and exit its process.\n"
   "This function cleanly uninitialized the engine and then exits back to the system with a process "
   "exit status indicating an error.\n\n"
   "@param message The message to log to the console and show in an error message box.\n\n"
   "@see quit\n\n"
   "@ingroup Platform" )