I have a config file containing filename without extension each line.

//load.config

aa
bb

I read them to array and build the full path for each file.

configFile="C:/xxxx/load.config"

myarray=()

while read -r line || [ -n "$line" ]; do
    myarray+=("$line")
    echo "$line"
done < "$configFile"


folder="C:/project/test/"

for((i = 0; i < ${#myarray[@]}; ++i))
do
    file=${myarray[$i]}

    echo "folder="$folder
    echo "file="$file
    
    file_path=$folder$file".xml"

    echo "$file_path"
    echo "next..."

done

Below is the result:

aa
bb
folder=C:/project/test/
file=aa
.xmlroject/test/aa
next...
folder=C:/project/test/
file=bb
C:/project/test/bb.xml
next...

Why does it give me this??

.xmlroject/test/aa