kubernetesvnet.json fails when using Windows agent

[tovern]

Is this a request for help?:
Yes
Is this an ISSUE or FEATURE REQUEST? (choose one):
Issue
What version of acs-engine?:
v0.9.4
**Orchestrator and version
Kubernetes
If this is a ISSUE, please:
When provisioning a Kubernetes cluster to an existing VNET using the kubernetesvnet.json example, we get the below error message. This only occurs when we select osType:Windows in the agent pool, Linux works fine without any errors.
k8s-json.txt

What happened:
Deployment failed. Correlation ID: 3d98c00a-cd1f-4a9b-873c-0362273127c3. {
"error": {
"code": "InvalidTemplate",
"message": "Unable to process template language expressions for resource '/subscriptions/f4d3baf2-f1b5-415f-8e72-102f0db6e436/resourceGroups/cont-RG/providers/Microsoft.Compute/virtualMachines/76069k8s9000' at line '1' and column '90609'. 'The template variable 'subnet' is not found. Please see https://aka.ms/arm-template/#variables for usage details.'"
}
}

Any help would be appreciated.

[tovern]

Just found this duplicate

[tovern]

#1767