filename:sampletest.xml
                                           sampletest_111.xml

Extrfile001.xml just 1 file is getting created

Extrfile001.xml
Extrfile002.xml

arr=($(ls | grep "../Inbound/Extrfile[0-9]*.xml"))

#!/bin/sh

# Add all Input files to array
FileList=($(ls | grep "../Inbound/sampletest*\\_[0-9]"))
  
echo  "$FileList"  

#loop array for Input files

for x in "${FileList[@]}"
do
 #for each element in array
 

#File Split Begin
awk -f xml_tag_handler.awk -f File_split.awk OUT=$x"" ROWS="500" $x $x
mv $x ../Staging
done

rm Response.xml Extr*.xml 


for f in ../Inbound/sampletest_*
  do    TMP="${f/sampletest_/Extrfile}"
         mv "$f" "${TMP%.*}"
  done

# add all files to array
arr=($(ls | grep "../Inbound/Extrfile[0-9]*.xml"))