macOS - AppleScript + shell script… | Apple Developer Forums

macOS - AppleScript + shell script + calendar alarm not returning value but working in automator

So I have a shell script called > tm.sh which gets the last time time machine successfully backed.
This works fine in the

shell,
script editor,
automator

doesn't work as a calendar alarm.

I'm unsure why the "do shell script" line is not working

tm.sh

Code Block #!/bin/sh
enabled=`/usr/bin/defaults read /Library/Preferences/com.apple.TimeMachine AutoBackup`
if [ "$enabled" == "1" ];then
lastBackupTimestamp=`date -j -f "%a %b %d %T %Z %Y" "$(/usr/libexec/PlistBuddy -c "Print Destinations:0:SnapshotDates" /Library/Preferences/com.apple.TimeMachine.plist | tail -n 2 | head -n 1 | awk '{$1=$1};1')" "+%Y-%m-%d %H:%M:%S"`
echo "$lastBackupTimestamp"
else
echo "<result>Disabled</result>"
fi

Code Block
#!/bin/sh
enabled=`/usr/bin/defaults read /Library/Preferences/com.apple.TimeMachine AutoBackup`
if [ "$enabled" == "1" ];then
lastBackupTimestamp=`date -j -f "%a %b %d %T %Z %Y" "$(/usr/libexec/PlistBuddy -c "Print Destinations:0:SnapshotDates" /Library/Preferences/com.apple.TimeMachine.plist \| tail -n 2 \| head -n 1 \| awk '{$1=$1};1')" "+%Y-%m-%d %H:%M:%S"`
echo "$lastBackupTimestamp"
else
echo "<result>Disabled</result>"
fi

My calendar alarm
Automator > New > Calendar alarm > run apple script

Calendar Alarm AppleScript

Code Block on callDateSeperator(dateChange)
	set yN to text 1 thru 4 of (dateChange as text)
	set mN to text 6 thru 7 of (dateChange as text)
	set dN to text 9 thru 10 of (dateChange as text)
	return {yN, mN, dN}
end callDateSeperator
on run {input, parameters}
	set timeMachineLastDate to (do shell script "sh ~/Desktop/tm.sh")
	set tmDate to callDateSeperator(timeMachineLastDate)
	display dialog (item 1 of tmDate) & (item 2 of tmDate) & (item 3 of tmDate)
	return input
end run

Code Block
on callDateSeperator(dateChange)
set yN to text 1 thru 4 of (dateChange as text)
set mN to text 6 thru 7 of (dateChange as text)
set dN to text 9 thru 10 of (dateChange as text)
return {yN, mN, dN}
end callDateSeperator

on run {input, parameters}
set timeMachineLastDate to (do shell script "sh ~/Desktop/tm.sh")
set tmDate to callDateSeperator(timeMachineLastDate)
display dialog (item 1 of tmDate) & (item 2 of tmDate) & (item 3 of tmDate)
return input
end run

I have given full disk access to

automator
calendar

error: this error comes because "timeMachineLastDate" has no value.
The action: "Run AppleScript" encountered an error: Can't get text 1 thru 4 of ""."