diff --git a/chrest/cellreorder.py b/chrest/cellreorder.py
new file mode 100644
index 0000000..4de4fad
--- /dev/null
+++ b/chrest/cellreorder.py
@@ -0,0 +1,377 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Mon Mar 18 11:23:16 2024
+
+@author: rkolo
+"""
+
+# this file is to reorganize the cells between two hdf5 output files
+
+import argparse
+import pathlib
+import sys, os
+import pandas
+
+import numpy as np
+import h5py
+import time
+
+from chrestData import ChrestData
+from supportPaths import expand_path
+from scipy.spatial import KDTree
+from scipy.interpolate import griddata
+import interpolate 
+from enum import Enum
+from xdmfGenerator import XdmfGenerator
+from multiprocessing import Pool
+
+#support functions
+def find3Dcellsectionnew(section,cellSS,vertindSS):
+    indexvect=np.where((cellSS[:,0] == vertindSS[section[0]][0]) 
+                                   & (cellSS[:,1] == vertindSS[section[1]][0]) 
+                                   & (cellSS[:,2] == vertindSS[section[2]][0]) 
+                                   & (cellSS[:,3] == vertindSS[section[3]][0])
+                                   & (cellSS[:,4] == vertindSS[section[4]][0])
+                                   & (cellSS[:,5] == vertindSS[section[5]][0])
+                                   & (cellSS[:,6] == vertindSS[section[6]][0])
+                                   & (cellSS[:,7] == vertindSS[section[7]][0]))[0][0]
+    return indexvect
+
+
+
+def find2Dcellsectionnew(args):
+    section,cellSS,vertindSS=args
+    # indexvect=np.zeros([section.shape[0],1])
+    # for i in range(len(indexvect)):
+    indexvect=np.where((cellSS[:,0] == vertindSS[section[0]][0]) 
+                                   & (cellSS[:,1] == vertindSS[section[1]][0]) 
+                                   & (cellSS[:,2] == vertindSS[section[2]][0]) 
+                                   & (cellSS[:,3] == vertindSS[section[3]][0]))[0][0]
+    return indexvect
+
+def find2Dcellsection(args):
+    section,vertindSS,SSfilePath = args
+    hdf5SS = h5py.File(SSfilePath, 'r')
+    cellSS=hdf5SS['/viz/topology/cells'][()]
+    hdf5SS.close()
+    indexvect=np.zeros([section.shape[0],1])
+    for i in range(len(indexvect)):
+        indexvect[i]=np.where((cellSS[:,0] == vertindSS[section[i,0]][0]) 
+                                   & (cellSS[:,1] == vertindSS[section[i,1]][0]) 
+                                   & (cellSS[:,2] == vertindSS[section[i,2]][0]) 
+                                   & (cellSS[:,3] == vertindSS[section[i,3]][0]))[0][0]
+    return indexvect
+
+
+class Fieldconvert:
+    """
+    Creates a new class from hdf5 chrest formatted file(s).
+    """
+
+    def __init__(self):
+
+        self.dimension=0
+        
+        self.SSfilePath=[]
+        self.cellSS=[]
+        self.vertSS=[]
+        self.solSS=[]
+        
+        self.newfilePath=[]
+        self.cellnew=[]
+        self.vertnew=[]
+        self.solnew=[]
+        
+        self.vertindSS=[]
+        self.cellindSS=[]
+
+        self.savedata=False
+        
+    def parsedata(self):
+        
+        hdf5SS = h5py.File(self.SSfilePath, 'r')
+        
+        self.cellSS=hdf5SS['/viz/topology/cells'][()]
+        self.vertSS=hdf5SS['/geometry/vertices'][()]
+        self.solSS=hdf5SS['/fields/solution'][()]
+        self.dimension=self.vertSS.shape[1]
+        hdf5SS.close()
+        
+        hdf5new = h5py.File(self.newfilePath, 'r')
+        self.cellnew=hdf5new['/viz/topology/cells'][()]
+        self.vertnew=hdf5new['/geometry/vertices'][()]
+        hdf5new.close()
+        
+        
+        self.vertindSS=np.zeros([len(self.vertSS),1])
+        self.cellindSS=np.zeros([len(self.cellSS),1])
+        self.newmat=[]
+        
+        self.serial=True
+        
+        return 0
+        
+    def findverticies(self):
+        
+        if self.dimension==2:
+            if self.serial:
+                # serial
+                start_time = time.time()
+                for i in range(len(self.vertnew)):
+                    self.vertindSS[i] = np.where((self.vertSS[:,0] == self.vertnew[i,0]) & (self.vertSS[:,1]==self.vertnew[i,1]))[0][0]
+                print("--- %s seconds for finding the verticies 2D---" % (time.time() - start_time))
+            else:
+                #multiprocessing
+                start_time = time.time()
+                from multiprocessing import cpu_count
+                n_cores = cpu_count()
+                pieces = np.array_split(self.vertnew, n_cores-1)
+                with Pool(processes=n_cores-1) as pool:
+                    results = pool.map(self.find2Dindvertsection, [(piece) for piece in pieces])
+                self.vertindSS = np.concatenate(results)  
+                print("--- %s seconds for finding the verticies 2D---" % (time.time() - start_time))
+        
+
+        elif self.dimension==3:
+            if self.serial:
+                #serial
+                start_time = time.time()
+                for i in range(len(self.vertnew)):
+                    self.vertindSS[i] = np.where((self.vertSS[:,0] == self.vertnew[i,0]) & (self.vertSS[:,1]==self.vertnew[i,1]) & (self.vertSS[:,2]==self.vertnew[i,2]))[0][0]
+                print("--- %s seconds for finding the verticies 3D---" % (time.time() - start_time))
+            else:
+                #multiprocessing
+                start_time = time.time()
+                from multiprocessing import cpu_count
+                n_cores = cpu_count()
+                
+                pieces = np.array_split(self.vertnew, n_cores-1)
+                # for piece in pieces:
+                #     a=self.findindvertsection(piece)
+                # Create a pool of workers
+                with Pool(processes=n_cores-1) as pool:
+                    results = pool.map(self.find3Dindvertsection, [(piece) for piece in pieces])
+                self.vertindSS = np.concatenate(results)  
+                print("--- %s seconds for finding the verticies 3D---" % (time.time() - start_time)) 
+            
+        return 0     
+    
+    def findcells(self):
+        from multiprocessing import cpu_count
+        n_cores = cpu_count()
+        if self.dimension==2:
+            
+            if self.serial:
+                
+                #option 1 old way
+                start_time = time.time()
+                for i in range(len(self.cellSS)):
+                    self.cellindSS[i]=np.where((self.cellSS[:,0] == self.vertindSS[self.cellnew[i,0]][0]) 
+                                               & (self.cellSS[:,1] == self.vertindSS[self.cellnew[i,1]][0]) 
+                                               & (self.cellSS[:,2] == self.vertindSS[self.cellnew[i,2]][0]) 
+                                               & (self.cellSS[:,3] == self.vertindSS[self.cellnew[i,3]][0]))[0][0]
+                print("--- %s seconds for finding the cells serial ---" % (time.time() - start_time))
+            
+            
+            else:
+                #option 2 slit it up 
+                start_time = time.time()
+                pieces = np.array_split(self.cellnew, n_cores-1)
+                # Create a pool of workers
+                # for row in self.cellnew:
+                #     a=self.find2Dcellsectionnew(row)
+                with Pool(processes=n_cores-1) as pool:
+                    results = pool.map(self.find2Dcellsectionclass, [piece for piece in pieces])
+                    # results = pool.map(self.find2Dcellsectionnew, [row for row in self.cellnew])
+                self.cellindSS = np.concatenate(results) 
+                # self.cellindSS = results
+                print("--- %s seconds for finding the cells class pieces ---" % (time.time() - start_time))            
+            
+            
+            # #option 3 give the entire array to map
+            # start_time = time.time()
+            # pieces = np.array_split(self.cellnew, n_cores-1)
+            # # Create a pool of workers
+            # # for row in self.cellnew:
+            # #     a=self.find2Dcellsectionnew(row)
+            # with Pool(processes=n_cores-1) as pool:
+            #     # results = pool.map(self.find2Dcellsection, [piece for piece in pieces])
+            #     results = pool.map(self.find2Dcellsectionnewclass, [row for row in self.cellnew])
+            # # self.cellindSS = np.concatenate(results) 
+            # self.cellindSS = results
+            # print("--- %s seconds for finding the cells class rows ---" % (time.time() - start_time))
+
+
+
+            # #option 4 slit it up 
+            # start_time = time.time()
+            # pieces = np.array_split(self.cellnew, n_cores-1)
+            # # Create a pool of workers
+            # # for row in self.cellnew:
+            # # a=find2Dcellsection([pieces[0],self.cellSS,self.vertindSS])
+            # # a=self.cellSS
+            # # b=self.vertindSS
+            # with Pool(processes=n_cores-1) as pool:
+            #     results = pool.map(find2Dcellsection, [(piece,self.vertindSS,self.SSfilePath) for piece in pieces])
+            #     # results = pool.map(find2Dcellsection, [(piece,a,b) for piece in pieces])
+
+            # self.cellindSS = np.concatenate(results) 
+            # # self.cellindSS = results
+            # print("--- %s seconds for finding the cells pieces ---" % (time.time() - start_time))
+
+
+            # #option 5 give the entire array to map
+            # start_time = time.time()
+            # pieces = np.array_split(self.cellnew, n_cores-1)
+            # # Create a pool of workers
+            # # for row in self.cellnew:
+            # #     a=self.find2Dcellsectionnew(row)
+            # with Pool(processes=n_cores-1) as pool:
+            #     # results = pool.map(self.find2Dcellsection, [piece for piece in pieces])
+            #     results = pool.map(find2Dcellsectionnew, [(row,self.cellSS,self.vertindSS) for row in self.cellnew])
+            # # self.cellindSS = np.concatenate(results) 
+            # self.cellindSS = results
+            # print("--- %s seconds for finding the cells rows---" % (time.time() - start_time))
+
+        elif self.dimension==3:
+            
+            if self.serial:
+            
+                #option 1 - serial
+                start_time = time.time()
+                # for i in range(len(self.cellSS)):
+                for i in range(len(self.cellSS)):
+                    self.cellindSS[i]=np.where((self.cellSS[:,0] == self.vertindSS[self.cellnew[i,0]][0]) 
+                                               & (self.cellSS[:,1] == self.vertindSS[self.cellnew[i,1]][0]) 
+                                               & (self.cellSS[:,2] == self.vertindSS[self.cellnew[i,2]][0]) 
+                                               & (self.cellSS[:,3] == self.vertindSS[self.cellnew[i,3]][0])
+                                               & (self.cellSS[:,4] == self.vertindSS[self.cellnew[i,4]][0])
+                                               & (self.cellSS[:,5] == self.vertindSS[self.cellnew[i,5]][0])
+                                               & (self.cellSS[:,6] == self.vertindSS[self.cellnew[i,6]][0])
+                                               & (self.cellSS[:,7] == self.vertindSS[self.cellnew[i,7]][0]))[0][0]
+                print("--- %s seconds for finding the cells serial ---" % (time.time() - start_time))
+            
+            
+            
+            #option 2 -multiprocessing
+            
+            else:
+                start_time = time.time()
+                pieces = np.array_split(self.cellnew, n_cores-1)
+                # Create a pool of workers
+                # for row in self.cellnew:
+                #     a=self.find2Dcellsectionnew(row)
+                with Pool(processes=n_cores-1) as pool:
+                    # results = pool.map(self.find2Dcellsection, [piece for piece in pieces])
+                    results = pool.map(find3Dcellsectionnew, [(row,self.cellSS,self.vertindSS) for row in self.cellnew])
+                # self.cellindSS = np.concatenate(results) 
+                self.cellindSS = results
+                print("--- %s seconds for finding the cells multi ---" % (time.time() - start_time))
+            
+            
+        return 0
+
+        
+    def reorder(self):
+        self.newmat=np.zeros_like(self.solSS)
+        for i in range(len(self.cellSS)):
+            self.newmat[0,i,:]=self.solSS[0,int(self.cellindSS[i]),:]
+        return 0
+    
+    def writedata(self):
+        
+        hdf5new = h5py.File(self.newfilePath, 'r+')
+
+        solnew=hdf5new['/fields/solution'][()]
+        solnew[...] = self.newmat
+        
+        hdf5new['/fields/solution'][()]=self.newmat
+        
+        hdf5new.close()
+
+        
+        hdf5new = h5py.File(self.newfilePath, 'r+')
+        b=hdf5new['/fields/solution'][()]
+        # solnew[...] = self.newmat
+        hdf5new.close()
+        
+        return 0
+    
+    def find2Dindvertsection(self,section):
+        indexvect=np.zeros([section.shape[0],1])
+        for i in range(len(indexvect)):
+            indexvect[i] = np.where((self.vertSS[:,0] == section[i,0]) & (self.vertSS[:,1]==section[i,1]))[0][0]
+        return indexvect  
+    
+    def find3Dindvertsection(self,section):
+        indexvect=np.zeros([section.shape[0],1])
+        for i in range(len(indexvect)):
+            indexvect[i] = np.where((self.vertSS[:,0] == section[i,0]) & (self.vertSS[:,1]==section[i,1])& (self.vertSS[:,2]==section[i,2]))[0][0]
+        return indexvect        
+
+    def find2Dcellsectionnewclass(self,section):
+        # indexvect=np.zeros([section.shape[0],1])
+        # for i in range(len(indexvect)):
+        indexvect=np.where((self.cellSS[:,0] == self.vertindSS[section[0]][0]) 
+                                       & (self.cellSS[:,1] == self.vertindSS[section[1]][0]) 
+                                       & (self.cellSS[:,2] == self.vertindSS[section[2]][0]) 
+                                       & (self.cellSS[:,3] == self.vertindSS[section[3]][0]))[0][0]
+        return indexvect
+    
+    def find2Dcellsectionclass(self,section):
+        indexvect=np.zeros([section.shape[0],1])
+        for i in range(len(indexvect)):
+            indexvect[i]=np.where((self.cellSS[:,0] == self.vertindSS[section[i,0]][0]) 
+                                       & (self.cellSS[:,1] == self.vertindSS[section[i,1]][0]) 
+                                       & (self.cellSS[:,2] == self.vertindSS[section[i,2]][0]) 
+                                       & (self.cellSS[:,3] == self.vertindSS[section[i,3]][0]))[0][0]
+        return indexvect
+    
+    def find3Dcellsection(self,section):
+        indexvect=np.zeros(section.shape)
+        for i in range(len(indexvect)):
+            indexvect[i]=np.where((self.cellSS[:,0] == self.vertindSS[section[i,0]][0]) 
+                                       & (self.cellSS[:,1] == self.vertindSS[section[i,1]][0]) 
+                                       & (self.cellSS[:,2] == self.vertindSS[section[i,2]][0]) 
+                                       & (self.cellSS[:,3] == self.vertindSS[section[i,3]][0])
+                                       & (self.cellSS[:,4] == self.vertindSS[section[i,4]][0])
+                                       & (self.cellSS[:,5] == self.vertindSS[section[i,5]][0])
+                                       & (self.cellSS[:,6] == self.vertindSS[section[i,6]][0])
+                                       & (self.cellSS[:,7] == self.vertindSS[section[i,7]][0]))[0][0]
+        return indexvect
+        
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description='Generate a chrest data file from an ablate file')
+
+    parser.add_argument('--fileSS', dest='fileSS', type=pathlib.Path, required=True,
+                            help='The steady state file path'
+                                 'to supply more than one file.')
+        
+    parser.add_argument('--filenew', dest='filenew', type=pathlib.Path, required=True,
+                            help='The steady state file path'
+                                 'to supply more than one file.')
+    
+    parser.add_argument('--parallel', dest='parallel', action='store_true',
+                        help="running it in parallel",
+                        )
+
+    print("Start reordering the fields")
+    args = parser.parse_args()
+    
+    convert=Fieldconvert()
+    
+    if args.parallel:
+        convert.serial=False
+    
+    convert.SSfilePath=args.fileSS
+    convert.newfilePath=args.filenew
+    
+    convert.parsedata()
+    convert.findverticies()
+    convert.findcells()
+    convert.reorder()
+    convert.writedata()
+    
+    print("Finished reordering the fields")
+