volatility keeps giving me this messege

[crimsoncybr]

hey all.
I tried to use build this script and I keep getting the same message
when I use the volatility command in a CLI it works but not in the script.
at a certain point, I just used the VOLEX script with a built-in file name and it still gave me the same message
I thought meyby the "./" was the problem , but I keep getting the same message and not getting the file output that I want

#!/bin/bash

function FILE() 
{
    echo -e "\033[1;34m Enter memory file.\e[0m"
    read FILE
    echo -e "\033[1;34m $FILE will be processed.\e[0m"

    # Cheacks  the path to the file you want to scan
    if [ -e "$FILE" ]; then
        echo -e "\033[1;32m file $FILE exists.\e[0m"
    else
        echo -e "\033[1;31m file $FILE does not exist\e[0m"
    fi
}

function VOLEX()
 {
    ./volatility_2.6_lin64_standalone/volatility_2.6_lin64_standalone -f "$FILE"  imageinfo > volimigeinfo.txt
    
}

VOLEX