Override template parameter in the script - powershell

Question

I am deploying VMs using a template and parameter file. I would like to override the parameter files virtualMachineName, so I can dynamically name each VM without needing 10 different parameter files. What is the correct syntax to do so?
Currently I have:
New-AzureRmResourceGroupDeployment -ResourceGroupName "myRSG" -TemplateFile $server1TmpFile -TemplateParameterFile $serverParamFile -virtualMachineName "AS1FTW12" -networkInterfaceName "AS1FTW12NIC" -networkSecurityGroupName "MyNSGName"
This will produce an error:
New-AzureRmResourceGroupDeployment : A parameter cannot be found that matches parameter name 'virtualMachineName'
I am authoring the script using PowerShell Tools for Visual Studio 2017. My installed PowerShell AzureRM version is 5.1.1 according to Get-Module AzureRM.

Answer 1

This Works with AzureRM 5.1.1, you can test with the following setup:
template:
{
"$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"paramTest": {
"type": "string"
}
},
"resources": [],
"outputs": {
"result": {
"type": "string",
"value": "[parameters('paramTest')]"
}
}
}
parameters:
{
"$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentParameters.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"paramTest": {
"value": "GEN-UNIQUE"
}
}
}
Powershell:
New-AzureRmResourceGroupDeployment -ResourceGroupName rg -TemplateFile template.json -TemplateParameterFile param.json -paramTest somevalue
results in output value equal to the one passed from powershell
Your error indicates that the parameter name is wrong, doublé check it