Error when creating a new item prototype (proxmox)

[roteki]

I'm using Zabbix 7.0.4 and I want to create a new item prototype for Proxmox VE by HTTP that calculates the % of used memory


Yet, I receive this error.


I plan to do the same thing for filesystems so that I can use them in Grafana and receive alerts.

[cyber]

It says you dont have an item you are referring to ... is that "memused" item present?

[roteki]

yes, they are predefined dependent item prototypes with name and key respectively like this: Node [{#NODE.NAME}]: RRD statistics: Node [{#NODE.NAME}]: Memory, used
proxmox.node.memused[{#NODE.NAME}] and Node [{#NODE.NAME}]: RRD statistics: Node [{#NODE.NAME}]: Memory, total
proxmox.node.memtotal[{#NODE.NAME}]

[roteki]

the item prototypes that I have used are like this

[roteki]

I have also tried this formula 100*last(/Proxmox VE by HTTP/proxmox.node.memused[{#NODE.NAME}])/last(/Proxmox VE by HTTP/proxmox.node.memtotal[{#NODE.NAME}]) but again I receive an error