AppleScripts for sending iMessages and Attachment

apple-script-send-imessage.sh

osascript send-imessage.scpt "hello" "Homam Hosseini"

osascript send-imessage-pic.scpt `realpath northamerica-neb.jpg` "Homam Hosseini"

realpath.sh

realpath() {
    [[ $1 = /* ]] && echo "$1" || echo "$PWD/${1#./}"
}

send-imessage-pic.scpt

on run argv
	set filename to item 1 of argv
	set buddyName to item 2 of argv
	set attach to POSIX file filename
	tell application "Messages" to send attach to buddy buddyName
end run

send-imessage.scpt

on run argv
	set message to item 1 of argv
	set chatNumber to item 2 of argv as integer
	tell application "Messages" to send message to item chatNumber of text chats
end run

when i run this i get Can’t get item 2. Invalid index.
Can u help a little as learning

I can't send image. Please check