Unable to resize disk using API.

[Nadir]

I am trying to increase VM Disk size. Disk is Sata0 I am using /vmid/resize API.
I am sending following array to PUT request via CURL
$fields = array(
'disk'=>"sata0",
'skiplock'=>1,
'size' =>"+1",
);
This request return Error code 500 (internal server error)

But when i put
$fields = array(
'disk'=>"sata0",
'skiplock'=>1,
'size' =>"+0",
);
then it return HTTP Status 200 (OK)

I am unable to figure out what is wrong and why I am not able to resize.
Proxmox 5.4

 

[dcsapak]

try to give the unit,e.g. '+1G'

 

[Nadir]

@dcsapak send me your cheeks... I wanna kiss you on your cheeks because your recommendation solved my problem
Thanks a lot.