Comment 4 for bug 1591186

Thank you for trying this out from your setting.

I retried the heat stack-create using very much the same params as you did, it still failed (from our 2 testing systems) with the same error:

ERROR: Failed to validate: Failed to validate: resources[0]: Property network not assigned

The heat template-validate did not show any issue (see below). Just wondering if there is any debug option / logs I could use /look at for this failure ?

$ heat template-validate -e server_group.env.yaml -f server_group.yaml
{
  "Description": "No description",
  "Parameters": {
    "dns_list": {
      "Type": "CommaDelimitedList",
      "NoEcho": "false",
      "Description": "",
      "Label": "dns_list"
    },
    "public_net": {
      "Type": "String",
      "NoEcho": "false",
      "Description": "",
      "Value": "public",
      "Label": "public_net"
    },
    "image_id": {
      "Type": "String",
      "NoEcho": "false",
      "Description": "",
      "Value": "cirros-0.3.4-x86_64",
      "Label": "image_id"
    },
    "key_name": {
      "Type": "String",
      "NoEcho": "false",
      "Description": "",
      "Value": "default",
      "Label": "key_name"
    },
    "instances_per_group": {
      "Type": "Number",
      "NoEcho": "false",
      "Description": "",
      "Value": 1,
      "Label": "instances_per_group"
    },
    "instance_type": {
      "Type": "String",
      "NoEcho": "false",
      "Description": "",
      "Value": "m1.tiny",
      "Label": "instance_type"
    },
    "cidr": {
      "Type": "String",
      "NoEcho": "false",
      "Description": "",
      "Value": "10.0.0.16/24",
      "Label": "cidr"
    }
  }
}