Hi , I followed the example given in random.yaml .But getting below error .Can you please tell me what is wrong here . root@cic-1:~# heat stack-create test -f main.yaml WARNING (shell) "heat stack-create" is deprecated, please use "openstack stack create" instead ERROR: Property error: : resources.rg<nested_stack>.resources[0].properties: : Unknown Property names root@cic-1:~# cat main.yaml heat_template_version: 2015-04-30 description: Shows how to look up list/map values by group index parameters: net_names: type: json default: - network1: NetworkA1 network2: NetworkA2 - network1: NetworkB1 network2: NetworkB2 resources: rg: type: OS::Heat::ResourceGroup properties: count: 3 resource_def: type: nested.yaml properties: # Note you have to pass the index and the entire list into the # nested template, resolving via %index% doesn't work directly # in the get_param here index: "%index%" names: {get_param: net_names} outputs: all_values: value: {get_attr: [rg, value]} root@cic-1:~# cat nested.yaml heat_template_version: 2013-05-23 description: This is the template for I&V R6.1 base configuration to create neutron resources other than sg and vm for vyos vms parameters: net_names: type: json index: type: number resources: neutron_Network_1: type: OS::Neutron::Net properties: name: {get_param: [names, {get_param: index}, network1]} Thanks, A.Nanthini From: Rabi Mishra [mailto:ramishra@redhat.com] Sent: Tuesday, February 12, 2019 6:34 PM To: NANTHINI A A <nanthini.a.a@ericsson.com> Cc: hjensas@redhat.com; openstack-dev@lists.openstack.org Subject: Re: [Heat] Reg accessing variables of resource group heat api On Tue, Feb 12, 2019 at 11:14 AM NANTHINI A A <nanthini.a.a@ericsson.com<mailto:nanthini.a.a@ericsson.com>> wrote: Hi , May I know in the following example given parameters: resource_name_map: - network1: foo_custom_name_net1 network2: foo_custom_name_net2 - network1: bar_custom_name_net1 network2: bar_custom_name_net2 what is the parameter type ? json