diff --git a/zabbix-agent-scripts/get_nc_quota_metrics.py b/zabbix-agent-scripts/get_nc_quota_metrics.py
index 9c8dce9..78f7fe5 100644
--- a/zabbix-agent-scripts/get_nc_quota_metrics.py
+++ b/zabbix-agent-scripts/get_nc_quota_metrics.py
@@ -32,7 +32,7 @@
 ## as the JSON file created is not correctly formatted as a JSON
 ## file.
 result_set = subprocess.check_output(
-                                     ["occ", "usage-report:generate"]
+                                     ["/usr/bin/php", "/var/www/nextcloud/occ", "usage-report:generate"]
                                     )
 
 result_set = result_set.decode()
@@ -47,6 +47,9 @@
                  names=column_names
                 )
 
+## In some cases assigned_quota get the value of -2 or 'none'. In these cases, we are replacing with 0
+df["assigned_quota"] = pd.to_numeric(df.assigned_quota.str.replace('none','0').str.replace('-2','0'))
+
 ## Transformation to int is necessary as json library cannot serialize numpy
 ## data types
 results = {