Hana scheduled Backups

Hello,

I'm trying to schedule Hana's backups.

First of all, I'm trying to execute with the sample script.

#!/bin/bash

# SAP HANA Backup

# define backup prefix

TIMESTAMP="$(date +\%F\_%H\%M)"

BACKUP_PREFIX="SCHEDULED"

BACKUP_PREFIX="$BACKUP_PREFIX"_"$TIMESTAMP"

# source HANA environment

. /usr/sap/shared/DB1/HDB01/hdbenv.sh

# execute command with user key

# asynchronous runs job in background and returns prompt

hdbsql -U backup_operator "backup data using file ('$BACKUP_PREFIX') ASYNCHRONOUS"

I've tried to execute the script directly but Im getting error -bash: ./backup_test.sh: Permission denied

How can I execute it?

Thanks